| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 3/31/2004 | HYS | Clayton | Traded away | SLG | | After |
| 3/31/2004 | HYS | Clayton | Acquired via trade | SLG | | After |
| 3/31/2004 | HYS | Pulido | Traded away | SLG | | After |
| 3/31/2004 | HYS | Pulido | Acquired via trade | SLG | | After |
| 3/31/2004 | SLG | Clayton | Traded away | HYS | | After |
| 3/31/2004 | SLG | Clayton | Acquired via trade | HYS | | After |
| 3/31/2004 | SLG | Pulido | Traded away | HYS | | After |
| 3/31/2004 | SLG | Pulido | Acquired via trade | HYS | | After |
| 4/3/2004 | SLG | Counsell | Promoted to active roster | | | Before |
| 4/5/2004 | BST | Owens | Promoted to active roster | | | Before |
| 4/5/2004 | SLG | Brower | Promoted to active roster | | | Before |
| 4/6/2004 | ANR | Branyan | Demoted to reserve roster | | | Before |
| 4/6/2004 | ANR | Encarnacion | Acquired via trade | BST | | After |
| 4/6/2004 | ANR | Quintero | Traded away | BST | | After |
| 4/6/2004 | BST | Fox | Demoted to reserve roster | | | Before |
| 4/6/2004 | BST | Halter | Promoted to active roster | | | Before |
| 4/6/2004 | BST | Owens | Demoted to reserve roster | | | Before |
| 4/6/2004 | BST | Roberts,W | Promoted to active roster | | | Before |
| 4/6/2004 | BST | Encarnacion | Traded away | ANR | | After |
| 4/6/2004 | BST | Quintero | Acquired via trade | ANR | | After |
| 4/6/2004 | COM | Escobar | Traded away | YAN | | After |
| 4/6/2004 | COM | Hernandez | Traded away | YAN | | After |
| 4/6/2004 | COM | Posada | Acquired via trade | YAN | | After |
| 4/6/2004 | COM | Wright | Traded away | YAN | | After |
| 4/6/2004 | HYS | Chen | Released | | | Before |
| 4/6/2004 | HYS | Singleton | Signed | | | Before |
| 4/6/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 4/6/2004 | SLG | Counsell | Demoted to reserve roster | | | Before |
| 4/6/2004 | SLG | Gregg | Demoted to reserve roster | | | Before |
| 4/6/2004 | SLG | Hoffman | Demoted to reserve roster | | | Before |
| 4/6/2004 | SLG | Julio | Promoted to active roster | | | Before |
| 4/6/2004 | SLG | Menechino | Released | | | Before |
| 4/6/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 4/6/2004 | SLG | Vina | Promoted to active roster | | | Before |
| 4/6/2004 | SLG | Quantrill | Acquired via trade | BAN | | After |
| 4/7/2004 | HEN | Davis | Promoted to active roster | | | Before |
| 4/7/2004 | HEN | Giambi | Demoted to reserve roster | | | Before |
| 4/7/2004 | HEN | Giambi | Promoted to active roster | | | Before |
| 4/7/2004 | HEN | Giles | Promoted to active roster | | | Before |
| 4/7/2004 | HEN | Hernandez | Demoted to reserve roster | | | Before |
| 4/7/2004 | HEN | Hernandez | Promoted to active roster | | | Before |
| 4/7/2004 | HEN | Johnson | Promoted to active roster | | | Before |
| 4/7/2004 | HEN | Lopez | Demoted to reserve roster | | | Before |
| 4/7/2004 | HEN | Obermueller | Demoted to reserve roster | | | Before |
| 4/7/2004 | HEN | Redmond | Demoted to reserve roster | | | Before |
| 4/7/2004 | HYS | Choi | Demoted to reserve roster | | | Before |
| 4/7/2004 | HYS | Nix | Promoted to active roster | | | Before |
| 4/7/2004 | HYS | Strickland | Demoted to reserve roster | | | Before |
| 4/7/2004 | SYN | DeJesus | Promoted to active roster | | | Before |
| 4/7/2004 | SYN | Tsao | Promoted to active roster | | | Before |
| 4/9/2004 | HSX | Hammock | Promoted to active roster | | | Before |
| 4/12/2004 | SLG | Lee,C | Traded away | YAN | | After |
| 4/12/2004 | SLG | Rivera,M | Acquired via trade | YAN | | After |
| 4/12/2004 | SLG | Wells | Acquired via trade | YAN | | After |
| 4/14/2004 | BLU | Ayala | Demoted to reserve roster | | | Before |
| 4/14/2004 | BLU | Randolph | Promoted to active roster | | | Before |
| 4/14/2004 | COM | Fossum | Demoted to reserve roster | | | Before |
| 4/14/2004 | COM | Stewart | Promoted to active roster | | | Before |
| 4/14/2004 | HEN | Bradford | Demoted to reserve roster | | | Before |
| 4/14/2004 | HEN | Timlin | Promoted to active roster | | | Before |
| 4/14/2004 | HSX | Colome | Demoted to reserve roster | | | Before |
| 4/14/2004 | HSX | Flaherty | Demoted to reserve roster | | | Before |
| 4/14/2004 | HSX | Stephenson | Promoted to active roster | | | Before |
| 4/14/2004 | HYS | Mays | Promoted to active roster | | | Before |
| 4/14/2004 | HYS | Roney | Demoted to reserve roster | | | Before |
| 4/14/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 4/14/2004 | SLG | Clayton | Demoted to reserve roster | | | Before |
| 4/14/2004 | SLG | Clayton | Promoted to active roster | | | Before |
| 4/14/2004 | SLG | Embree | Demoted to reserve roster | | | Before |
| 4/14/2004 | SLG | Hessman | Released | | | Before |
| 4/14/2004 | SLG | House | Released | | | Before |
| 4/14/2004 | SLG | House | Signed | | | Before |
| 4/14/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 4/14/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 4/14/2004 | SLG | Vina | Demoted to reserve roster | | | Before |
| 4/14/2004 | SYN | DeJesus | Demoted to reserve roster | | | Before |
| 4/14/2004 | SYN | Tsao | Demoted to reserve roster | | | Before |
| 4/19/2004 | COM | Corey | Promoted to active roster | | | Before |
| 4/19/2004 | COM | Fossum | Promoted to active roster | | | Before |
| 4/19/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 4/19/2004 | COM | Stewart | Demoted to reserve roster | | | Before |
| 4/19/2004 | HEG | Carroll | Demoted to reserve roster | | | Before |
| 4/19/2004 | HEG | Lee | Activated from disabled list | | | Before |
| 4/19/2004 | SLG | Hessman | Released | | | Before |
| 4/19/2004 | SLG | Hessman | Signed | | | Before |
| 4/19/2004 | SLG | House | Released | | | Before |
| 4/19/2004 | SLG | House | Signed | | | Before |
| 4/20/2004 | BLU | Ayala | Promoted to active roster | | | Before |
| 4/20/2004 | BLU | Baez | Demoted to reserve roster | | | Before |
| 4/20/2004 | BLU | Dempster | Promoted to active roster | | | Before |
| 4/20/2004 | BLU | Foppert | Demoted to reserve roster | | | Before |
| 4/20/2004 | BLU | Hall | Demoted to reserve roster | | | Before |
| 4/20/2004 | BLU | Haynes | Demoted to reserve roster | | | Before |
| 4/20/2004 | BLU | Valdes | Promoted to active roster | | | Before |
| 4/20/2004 | BLU | Womack | Promoted to active roster | | | Before |
| 4/20/2004 | COM | Rosario | Signed | | | Before |
| 4/20/2004 | COM | Sweeney | Signed | | | Before |
| 4/20/2004 | FOR | Hackman | Promoted to active roster | | | Before |
| 4/20/2004 | FOR | Leskanic | Demoted to reserve roster | | | Before |
| 4/20/2004 | FOR | Nunez | Demoted to reserve roster | | | Before |
| 4/20/2004 | FOR | Witasick | Promoted to active roster | | | Before |
| 4/20/2004 | HSX | Wilson | Promoted to active roster | | | Before |
| 4/20/2004 | HYS | Benoit | Promoted to active roster | | | Before |
| 4/20/2004 | HYS | Choi | Promoted to active roster | | | Before |
| 4/20/2004 | HYS | Mays | Demoted to reserve roster | | | Before |
| 4/20/2004 | HYS | Nix | Demoted to reserve roster | | | Before |
| 4/20/2004 | HYS | Roney | Promoted to active roster | | | Before |
| 4/20/2004 | HYS | Westbrook | Demoted to reserve roster | | | Before |
| 4/20/2004 | SLG | Clayton | Demoted to reserve roster | | | Before |
| 4/20/2004 | SLG | House | Demoted to reserve roster | | | Before |
| 4/20/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 4/20/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 4/20/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 4/21/2004 | HSX | Ruan | Promoted to active roster | | | Before |
| 4/24/2004 | HSX | Wilson | Demoted to reserve roster | | | Before |
| 4/25/2004 | SLG | Alomar | Acquired via trade | YAN | | After |
| 4/25/2004 | SLG | Counsell | Traded away | YAN | | After |
| 4/27/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 4/27/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 4/27/2004 | COM | Dreifort | Demoted to reserve roster | | | Before |
| 4/27/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 4/27/2004 | COM | Rosario | Demoted to reserve roster | | | Before |
| 4/27/2004 | COM | Sweeney | Demoted to reserve roster | | | Before |
| 4/27/2004 | FOR | Coomer | Demoted to reserve roster | | | Before |
| 4/27/2004 | FOR | Hackman | Demoted to reserve roster | | | Before |
| 4/27/2004 | FOR | Hackman | Promoted to active roster | | | Before |
| 4/27/2004 | FOR | Leskanic | Promoted to active roster | | | Before |
| 4/27/2004 | FOR | Mantei | Demoted to reserve roster | | | Before |
| 4/27/2004 | FOR | Nunez | Promoted to active roster | | | Before |
| 4/27/2004 | FOR | Stark | Demoted to reserve roster | | | Before |
| 4/27/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 4/27/2004 | FOR | Weaver | Promoted to active roster | | | Before |
| 4/27/2004 | FOR | Wright | Demoted to reserve roster | | | Before |
| 4/27/2004 | HSX | Flaherty | Promoted to active roster | | | Before |
| 4/27/2004 | HSX | Hammock | Demoted to reserve roster | | | Before |
| 4/27/2004 | HSX | Ruan | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Chen | Promoted to active roster | | | Before |
| 4/27/2004 | HYS | Mecir | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Peavy | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Roney | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Silva | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Silva | Promoted to active roster | | | Before |
| 4/27/2004 | HYS | Strickland | Promoted to active roster | | | Before |
| 4/27/2004 | HYS | Westbrook | Promoted to active roster | | | Before |
| 4/27/2004 | HYS | Wilson | Demoted to reserve roster | | | Before |
| 4/27/2004 | HYS | Wilson | Promoted to active roster | | | Before |
| 4/27/2004 | SLG | Embree | Promoted to active roster | | | Before |
| 4/27/2004 | SLG | Gallo | Demoted to reserve roster | | | Before |
| 4/27/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 5/2/2004 | FOR | Glanville | Promoted to active roster | | | Before |
| 5/2/2004 | HEG | Burba | Promoted to active roster | | | Before |
| 5/2/2004 | HEG | DeJean | Promoted to active roster | | | Before |
| 5/2/2004 | HEG | Reed | Demoted to reserve roster | | | Before |
| 5/2/2004 | HEG | Weber | Demoted to reserve roster | | | Before |
| 5/3/2004 | ANR | Calero | Promoted to active roster | | | Before |
| 5/3/2004 | ANR | Veres | Demoted to reserve roster | | | Before |
| 5/3/2004 | BLU | Foppert | Promoted to active roster | | | Before |
| 5/3/2004 | BLU | Jennings | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Asencio | Signed | | | Before |
| 5/3/2004 | FOR | Asencio | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Asencio | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Ashby | Signed | | | Before |
| 5/3/2004 | FOR | Ashby | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Ashby | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Glanville | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Glanville | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Hackman | Released | | | Before |
| 5/3/2004 | FOR | Stark | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Stark | Demoted to reserve roster | | | Before |
| 5/3/2004 | FOR | Telemaco | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Telemaco | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Weaver | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Weaver | Promoted to active roster | | | Before |
| 5/3/2004 | FOR | Wright | Released | | | Before |
| 5/3/2004 | HEN | Bradford | Promoted to active roster | | | Before |
| 5/3/2004 | HEN | DeRosa | Demoted to reserve roster | | | Before |
| 5/3/2004 | HEN | Hernandez | Promoted to active roster | | | Before |
| 5/3/2004 | HEN | Johnson | Demoted to reserve roster | | | Before |
| 5/3/2004 | HEN | Obermueller | Promoted to active roster | | | Before |
| 5/3/2004 | HEN | Wilkerson | Demoted to reserve roster | | | Before |
| 5/3/2004 | HYS | Chen | Released | | | Before |
| 5/3/2004 | HYS | Estalella | Signed | | | Before |
| 5/3/2004 | HYS | Macias | Signed | | | Before |
| 5/3/2004 | HYS | Mays | Promoted to active roster | | | Before |
| 5/3/2004 | HYS | Nivar | Demoted to reserve roster | | | Before |
| 5/3/2004 | HYS | Peavy | Promoted to active roster | | | Before |
| 5/3/2004 | HYS | Pulido | Released | | | Before |
| 5/3/2004 | HYS | Ross | Demoted to reserve roster | | | Before |
| 5/3/2004 | HYS | Silva | Demoted to reserve roster | | | Before |
| 5/3/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 5/3/2004 | SLG | Clayton | Promoted to active roster | | | Before |
| 5/3/2004 | SLG | Eischen | Promoted to active roster | | | Before |
| 5/3/2004 | SLG | Julio | Demoted to reserve roster | | | Before |
| 5/3/2004 | SYN | Cust | Demoted to reserve roster | | | Before |
| 5/3/2004 | SYN | Houston | Released | | | Before |
| 5/3/2004 | SYN | McDonald | Signed | | | Before |
| 5/3/2004 | SYN | Tsao | Promoted to active roster | | | Before |
| 5/3/2004 | SYN | Wagner | Demoted to reserve roster | | | Before |
| 5/3/2004 | SYN | Wagner | Promoted to active roster | | | Before |
| 5/8/2004 | ANR | Jackson | Demoted to reserve roster | | | Before |
| 5/8/2004 | ANR | Mahay | Promoted to active roster | | | Before |
| 5/8/2004 | HEG | DeJean | Demoted to reserve roster | | | Before |
| 5/8/2004 | HEG | Weber | Promoted to active roster | | | Before |
| 5/8/2004 | HSX | Dessens | Promoted to active roster | | | Before |
| 5/8/2004 | HSX | Schilling | Demoted to reserve roster | | | Before |
| 5/8/2004 | HSX | Witt | Promoted to active roster | | | Before |
| 5/8/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 5/8/2004 | SLG | Gregg | Promoted to active roster | | | Before |
| 5/8/2004 | SLG | Hudson | Demoted to reserve roster | | | Before |
| 5/8/2004 | SLG | Jenkins | Demoted to reserve roster | | | Before |
| 5/8/2004 | SLG | Jenkins | Promoted to active roster | | | Before |
| 5/8/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 5/8/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 5/10/2004 | BLU | Baez | Promoted to active roster | | | Before |
| 5/10/2004 | BLU | Ford | Demoted to reserve roster | | | Before |
| 5/10/2004 | BLU | Ford | Promoted to active roster | | | Before |
| 5/10/2004 | BLU | Perez | Promoted to active roster | | | Before |
| 5/10/2004 | BLU | Rueter | Demoted to reserve roster | | | Before |
| 5/10/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 5/10/2004 | FOR | Ashby | Promoted to active roster | | | Before |
| 5/10/2004 | FOR | Leskanic | Promoted to active roster | | | Before |
| 5/10/2004 | FOR | Mantei | Demoted to reserve roster | | | Before |
| 5/10/2004 | FOR | Torres | Demoted to reserve roster | | | Before |
| 5/10/2004 | HEN | Borowski | Demoted to reserve roster | | | Before |
| 5/10/2004 | HEN | DeRosa | Promoted to active roster | | | Before |
| 5/10/2004 | HEN | Giambi | Demoted to reserve roster | | | Before |
| 5/10/2004 | HEN | Hernandez | Demoted to reserve roster | | | Before |
| 5/10/2004 | HEN | Lopez | Promoted to active roster | | | Before |
| 5/10/2004 | HEN | Renteria | Demoted to reserve roster | | | Before |
| 5/10/2004 | HEN | Villafuerte | Promoted to active roster | | | Before |
| 5/10/2004 | HEN | Wilkerson | Promoted to active roster | | | Before |
| 5/12/2004 | BST | Fox | Promoted to active roster | | | Before |
| 5/13/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 5/13/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 5/13/2004 | BLU | Jennings | Promoted to active roster | | | Before |
| 5/13/2004 | BLU | Rivas | Placed on disabled list | | 5/12/2004 | Before |
| 5/13/2004 | HEN | Borowski | Demoted to reserve roster | | | Before |
| 5/13/2004 | HEN | Borowski | Promoted to active roster | | | Before |
| 5/13/2004 | HEN | Timlin | Placed on disabled list | | 5/12/2004 | Before |
| 5/13/2004 | HEN | Vogelsong | Promoted to active roster | | | Before |
| 5/14/2004 | ANR | Burroughs | Placed on disabled list | | 5/14/2004 | Before |
| 5/14/2004 | ANR | Michaels | Promoted to active roster | | | Before |
| 5/15/2004 | BLU | Ayala | Demoted to reserve roster | | | Before |
| 5/15/2004 | BLU | Hall | Promoted to active roster | | | Before |
| 5/15/2004 | BLU | Rivas | Demoted to reserve roster | | | Before |
| 5/15/2004 | FOR | Laker | Demoted to reserve roster | | | Before |
| 5/15/2004 | FOR | Telemaco | Demoted to reserve roster | | | Before |
| 5/15/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 5/15/2004 | FOR | Wilson | Promoted to active roster | | | Before |
| 5/15/2004 | HSX | Flaherty | Demoted to reserve roster | | | Before |
| 5/15/2004 | HSX | Hammock | Promoted to active roster | | | Before |
| 5/16/2004 | ANR | Burroughs | Activated from disabled list | | | Before |
| 5/16/2004 | BLU | Rivas | Activated from disabled list | | | Before |
| 5/16/2004 | BST | Cotts | Promoted to active roster | | | Before |
| 5/16/2004 | BST | Miller | Demoted to reserve roster | | | Before |
| 5/16/2004 | BST | Norton | Demoted to reserve roster | | | Before |
| 5/16/2004 | HEG | Harang | Promoted to active roster | | | Before |
| 5/16/2004 | HEG | Oliver | Demoted to reserve roster | | | Before |
| 5/16/2004 | HEN | Giambi | Promoted to active roster | | | Before |
| 5/16/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 5/16/2004 | HEN | Johnson | Promoted to active roster | | | Before |
| 5/16/2004 | HEN | Myers | Demoted to reserve roster | | | Before |
| 5/16/2004 | HEN | Redmond | Promoted to active roster | | | Before |
| 5/16/2004 | HEN | Renteria | Promoted to active roster | | | Before |
| 5/16/2004 | HEN | Schmidt | Demoted to reserve roster | | | Before |
| 5/16/2004 | HEN | Timlin | Activated from disabled list | | | Before |
| 5/17/2004 | HEN | Borowski | Promoted to active roster | | | Before |
| 5/17/2004 | HEN | Villafuerte | Placed on disabled list | | 5/17/2004 | Before |
| 5/21/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Dempster | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Ford | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Haynes | Released | | | Before |
| 5/21/2004 | BLU | Hernandez | Signed | | | Before |
| 5/21/2004 | BLU | Osuna | Released | | | Before |
| 5/21/2004 | BLU | Perez | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Perez | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Rivas | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Romero | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Rueter | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Santos | Signed | | | Before |
| 5/21/2004 | BLU | Santos | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Santos | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Santos | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Womack | Demoted to reserve roster | | | Before |
| 5/21/2004 | BLU | Womack | Promoted to active roster | | | Before |
| 5/21/2004 | BLU | Womack | Demoted to reserve roster | | | Before |
| 5/21/2004 | COM | Capuano | Demoted to reserve roster | | | Before |
| 5/21/2004 | COM | Corey | Promoted to active roster | | | Before |
| 5/21/2004 | COM | Stanton | Demoted to reserve roster | | | Before |
| 5/21/2004 | COM | Sweeney | Promoted to active roster | | | Before |
| 5/21/2004 | FOR | Laker | Demoted to reserve roster | | | Before |
| 5/21/2004 | FOR | Wilson | Promoted to active roster | | | Before |
| 5/21/2004 | SLG | Gregg | Demoted to reserve roster | | | Before |
| 5/21/2004 | SLG | Hudson | Promoted to active roster | | | Before |
| 5/21/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 5/21/2004 | SLG | Vina | Promoted to active roster | | | Before |
| 5/21/2004 | SYN | Appier | Released | | | Before |
| 5/21/2004 | SYN | Bragg | Signed | | | Before |
| 5/22/2004 | HEN | Villafuerte | Activated from disabled list | | | Before |
| 5/25/2004 | HEN | Dunn | Demoted to reserve roster | | | Before |
| 5/25/2004 | HEN | Giles | Promoted to active roster | | | Before |
| 5/25/2004 | HEN | Herges | Demoted to reserve roster | | | Before |
| 5/25/2004 | HEN | Hernandez | Promoted to active roster | | | Before |
| 5/25/2004 | HEN | Lopez | Demoted to reserve roster | | | Before |
| 5/25/2004 | HEN | Loretta | Demoted to reserve roster | | | Before |
| 5/25/2004 | HEN | Obermueller | Demoted to reserve roster | | | Before |
| 5/25/2004 | HSX | Ruan | Promoted to active roster | | | Before |
| 5/25/2004 | HYS | Benoit | Demoted to reserve roster | | | Before |
| 5/25/2004 | HYS | Greene | Demoted to reserve roster | | | Before |
| 5/25/2004 | HYS | Mecir | Promoted to active roster | | | Before |
| 5/25/2004 | HYS | Roney | Promoted to active roster | | | Before |
| 5/25/2004 | HYS | Ross | Promoted to active roster | | | Before |
| 5/25/2004 | HYS | Woodward | Demoted to reserve roster | | | Before |
| 5/26/2004 | HSX | Colome | Promoted to active roster | | | Before |
| 5/27/2004 | HEG | Harang | Placed on disabled list | | 5/23/2004 | Before |
| 5/27/2004 | HEG | Oliver | Promoted to active roster | | | Before |
| 5/28/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 5/28/2004 | COM | Dreifort | Promoted to active roster | | | Before |
| 5/28/2004 | COM | Stanton | Promoted to active roster | | | Before |
| 5/28/2004 | COM | Sweeney | Demoted to reserve roster | | | Before |
| 5/29/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 5/29/2004 | BLU | Dempster | Promoted to active roster | | | Before |
| 5/29/2004 | BLU | Foppert | Demoted to reserve roster | | | Before |
| 5/29/2004 | BLU | Hall | Demoted to reserve roster | | | Before |
| 5/29/2004 | BLU | Santos | Demoted to reserve roster | | | Before |
| 5/29/2004 | BLU | Santos | Promoted to active roster | | | Before |
| 5/29/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 5/29/2004 | BLU | Womack | Promoted to active roster | | | Before |
| 5/29/2004 | BOU | Heilman | Promoted to active roster | | | Before |
| 5/29/2004 | BOU | Wheeler | Demoted to reserve roster | | | Before |
| 5/29/2004 | BST | Cotts | Demoted to reserve roster | | | Before |
| 5/29/2004 | BST | Lilly | Demoted to reserve roster | | | Before |
| 5/29/2004 | BST | McClung | Promoted to active roster | | | Before |
| 5/29/2004 | BST | Vizcaino | Promoted to active roster | | | Before |
| 5/29/2004 | FOR | Mantei | Promoted to active roster | | | Before |
| 5/29/2004 | FOR | Sullivan | Demoted to reserve roster | | | Before |
| 5/29/2004 | HEG | Harang | Activated from disabled list | | | Before |
| 5/29/2004 | HEG | Mirabelli | Promoted to active roster | | | Before |
| 5/29/2004 | HEG | Ojeda | Placed on disabled list | | 5/29/2004 | Before |
| 5/29/2004 | HEG | Oliver | Demoted to reserve roster | | | Before |
| 5/29/2004 | HSX | Colome | Demoted to reserve roster | | | Before |
| 5/29/2004 | HSX | Ruan | Demoted to reserve roster | | | Before |
| 5/29/2004 | SLG | Brower | Demoted to reserve roster | | | Before |
| 5/29/2004 | SLG | Elarton | Released | | | Before |
| 5/29/2004 | SLG | Julio | Promoted to active roster | | | Before |
| 5/29/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 5/29/2004 | SLG | Magruder | Signed | | | Before |
| 5/29/2004 | SLG | Magruder | Demoted to reserve roster | | | Before |
| 5/29/2004 | SLG | Vina | Demoted to reserve roster | | | Before |
| 5/30/2004 | COM | Colbrunn | Promoted to active roster | | | Before |
| 6/4/2004 | HEG | Ojeda | Activated from disabled list | | | Before |
| 6/5/2004 | BLU | Ayala | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Ayala | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Bonderman | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Foppert | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Higginson | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Higginson | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Higginson | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Higginson | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 6/5/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 6/5/2004 | BLU | Womack | Demoted to reserve roster | | | Before |
| 6/5/2004 | BST | Lilly | Promoted to active roster | | | Before |
| 6/5/2004 | BST | McClung | Demoted to reserve roster | | | Before |
| 6/5/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 6/5/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 6/5/2004 | COM | Capuano | Promoted to active roster | | | Before |
| 6/5/2004 | COM | Colbrunn | Demoted to reserve roster | | | Before |
| 6/5/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 6/5/2004 | COM | Corey | Promoted to active roster | | | Before |
| 6/5/2004 | COM | Dreifort | Demoted to reserve roster | | | Before |
| 6/5/2004 | COM | Dreifort | Promoted to active roster | | | Before |
| 6/5/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEG | Ojeda | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Herges | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | Johnson | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Lopez | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | Loretta | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | McMillon | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Myers | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | Obermueller | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | Renteria | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Rhodes | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Schmidt | Promoted to active roster | | | Before |
| 6/5/2004 | HEN | Vogelsong | Demoted to reserve roster | | | Before |
| 6/5/2004 | HEN | Williamson | Demoted to reserve roster | | | Before |
| 6/5/2004 | HSX | Inge | Demoted to reserve roster | | | Before |
| 6/5/2004 | HSX | Wooten | Promoted to active roster | | | Before |
| 6/5/2004 | HYS | Strickland | Demoted to reserve roster | | | Before |
| 6/5/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 6/5/2004 | SLG | Eischen | Demoted to reserve roster | | | Before |
| 6/5/2004 | SLG | Gallo | Promoted to active roster | | | Before |
| 6/5/2004 | SLG | Jenkins | Demoted to reserve roster | | | Before |
| 6/5/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 6/5/2004 | SLG | Magruder | Promoted to active roster | | | Before |
| 6/6/2004 | HEN | Blalock | Placed on disabled list | | 6/6/2004 | Before |
| 6/6/2004 | HEN | Renteria | Promoted to active roster | | | Before |
| 6/6/2004 | HSX | Stewart | Promoted to active roster | | | Before |
| 6/7/2004 | BST | Norton | Promoted to active roster | | | Before |
| 6/10/2004 | HEG | Silva | Acquired via trade | HYS | | After |
| 6/10/2004 | HEG | White | Traded away | HYS | | After |
| 6/10/2004 | HYS | Silva | Traded away | HEG | | After |
| 6/10/2004 | HYS | White | Acquired via trade | HEG | | After |
| 6/11/2004 | BLU | Bonderman | Promoted to active roster | | | Before |
| 6/11/2004 | BLU | Rueter | Demoted to reserve roster | | | Before |
| 6/11/2004 | BST | Neu | Demoted to reserve roster | | | Before |
| 6/11/2004 | BST | Norton | Demoted to reserve roster | | | Before |
| 6/11/2004 | BST | Owens | Promoted to active roster | | | Before |
| 6/11/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 6/11/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 6/11/2004 | COM | Dreifort | Demoted to reserve roster | | | Before |
| 6/11/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 6/11/2004 | FOR | Leskanic | Demoted to reserve roster | | | Before |
| 6/11/2004 | FOR | Sullivan | Promoted to active roster | | | Before |
| 6/11/2004 | HEG | Burba | Demoted to reserve roster | | | Before |
| 6/11/2004 | HEG | Carroll | Promoted to active roster | | | Before |
| 6/11/2004 | HEG | Reed | Promoted to active roster | | | Before |
| 6/11/2004 | HEG | Silva | Promoted to active roster | | | Before |
| 6/11/2004 | HEG | White | Demoted to reserve roster | | | Before |
| 6/11/2004 | HEN | Blalock | Activated from disabled list | | | Before |
| 6/11/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 6/11/2004 | HEN | Giles | Promoted to active roster | | | Before |
| 6/11/2004 | HEN | Myers | Demoted to reserve roster | | | Before |
| 6/11/2004 | HEN | Renteria | Demoted to reserve roster | | | Before |
| 6/11/2004 | HEN | Renteria | Promoted to active roster | | | Before |
| 6/11/2004 | HSX | Stewart | Demoted to reserve roster | | | Before |
| 6/11/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 6/11/2004 | SLG | Gallo | Demoted to reserve roster | | | Before |
| 6/11/2004 | SLG | Gregg | Promoted to active roster | | | Before |
| 6/11/2004 | SLG | Jenkins | Promoted to active roster | | | Before |
| 6/11/2004 | SLG | Jose | Signed | | | Before |
| 6/11/2004 | SLG | Jose | Demoted to reserve roster | | | Before |
| 6/11/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 6/11/2004 | SLG | Magruder | Released | | | Before |
| 6/11/2004 | SYN | Harden | Demoted to reserve roster | | | Before |
| 6/11/2004 | SYN | Park | Promoted to active roster | | | Before |
| 6/16/2004 | HEG | Weber | Demoted to reserve roster | | | Before |
| 6/16/2004 | HEG | White | Promoted to active roster | | | Before |
| 6/16/2004 | SLG | Hasegawa | Acquired via trade | IRI | | After |
| 6/16/2004 | SLG | Julio | Traded away | IRI | | After |
| 6/18/2004 | BLU | Cornejo | Signed | | | Before |
| 6/18/2004 | BLU | Foppert | Demoted to reserve roster | | | Before |
| 6/18/2004 | BLU | Fultz | Demoted to reserve roster | | | Before |
| 6/18/2004 | BLU | Romero | Promoted to active roster | | | Before |
| 6/18/2004 | BLU | Santos | Released | | | Before |
| 6/18/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 6/18/2004 | COM | Dreifort | Promoted to active roster | | | Before |
| 6/18/2004 | FOR | Coomer | Demoted to reserve roster | | | Before |
| 6/18/2004 | FOR | Nunez | Promoted to active roster | | | Before |
| 6/18/2004 | FOR | Telemaco | Demoted to reserve roster | | | Before |
| 6/18/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 6/18/2004 | HEN | Davis | Demoted to reserve roster | | | Before |
| 6/18/2004 | HEN | Dellucci | Signed | | | Before |
| 6/18/2004 | HEN | Dunn | Promoted to active roster | | | Before |
| 6/18/2004 | HEN | Franco,M | Released | | | Before |
| 6/18/2004 | HEN | Giambi | Released | | | Before |
| 6/18/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 6/18/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 6/18/2004 | HEN | Hammonds | Signed | | | Before |
| 6/18/2004 | HEN | Hernandez | Demoted to reserve roster | | | Before |
| 6/18/2004 | HEN | Miller | Released | | | Before |
| 6/18/2004 | HEN | Myers | Promoted to active roster | | | Before |
| 6/18/2004 | HEN | Osuna | Signed | | | Before |
| 6/18/2004 | HSX | Colome | Promoted to active roster | | | Before |
| 6/18/2004 | HSX | Inge | Promoted to active roster | | | Before |
| 6/18/2004 | HSX | Stephenson | Demoted to reserve roster | | | Before |
| 6/18/2004 | HSX | Wilson | Promoted to active roster | | | Before |
| 6/18/2004 | HSX | Witt | Demoted to reserve roster | | | Before |
| 6/18/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 6/18/2004 | SLG | Goodwin | Demoted to reserve roster | | | Before |
| 6/18/2004 | SLG | Jose | Promoted to active roster | | | Before |
| 6/18/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 6/18/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 6/22/2004 | HSX | Witt | Promoted to active roster | | | Before |
| 6/24/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 6/24/2004 | BLU | Fultz | Promoted to active roster | | | Before |
| 6/24/2004 | BLU | Hall | Promoted to active roster | | | Before |
| 6/24/2004 | BLU | Romero | Demoted to reserve roster | | | Before |
| 6/24/2004 | HSX | Dessens | Demoted to reserve roster | | | Before |
| 6/24/2004 | HSX | Hollandsworth | Demoted to reserve roster | | | Before |
| 6/24/2004 | HSX | Schilling | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Alomar | Demoted to reserve roster | | | Before |
| 6/24/2004 | SLG | Alomar | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 6/24/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Gallo | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Goodwin | Promoted to active roster | | | Before |
| 6/24/2004 | SLG | Gregg | Demoted to reserve roster | | | Before |
| 6/24/2004 | SLG | Hummel | Signed | | | Before |
| 6/24/2004 | SLG | Hummel | Demoted to reserve roster | | | Before |
| 6/24/2004 | SLG | Jose | Released | | | Before |
| 6/24/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 6/25/2004 | BOU | Perez | Promoted to active roster | | | Before |
| 6/29/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 6/29/2004 | HEG | Chacon | Demoted to reserve roster | | | Before |
| 6/29/2004 | HEG | Oliver | Promoted to active roster | | | Before |
| 6/29/2004 | HEG | Silva | Placed on disabled list | | 6/28/2004 | Before |
| 6/29/2004 | HEG | Weber | Promoted to active roster | | | Before |
| 6/29/2004 | HEG | Cormier | Acquired via trade | BAN | | After |
| 6/29/2004 | HEN | Dellucci | Demoted to reserve roster | | | Before |
| 6/29/2004 | HEN | Dunn | Promoted to active roster | | | Before |
| 6/29/2004 | HEN | Lopez | Demoted to reserve roster | | | Before |
| 6/29/2004 | HEN | Lopez | Promoted to active roster | | | Before |
| 6/29/2004 | HEN | Myers | Promoted to active roster | | | Before |
| 6/29/2004 | HEN | Osuna | Demoted to reserve roster | | | Before |
| 6/29/2004 | HYS | Benoit | Promoted to active roster | | | Before |
| 6/29/2004 | HYS | Buchanan | Demoted to reserve roster | | | Before |
| 6/29/2004 | HYS | Plesac | Demoted to reserve roster | | | Before |
| 6/29/2004 | HYS | Woodward | Promoted to active roster | | | Before |
| 6/30/2004 | HEG | Silva | Activated from disabled list | | | Before |
| 7/1/2004 | ANR | Drew | Demoted to reserve roster | | | Before |
| 7/1/2004 | ANR | Greene | Demoted to reserve roster | | | Before |
| 7/1/2004 | ANR | Greene | Promoted to active roster | | | Before |
| 7/1/2004 | ANR | Guillen | Demoted to reserve roster | | | Before |
| 7/1/2004 | ANR | Guillen | Promoted to active roster | | | Before |
| 7/1/2004 | ANR | Rowand | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Ayala | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Baez | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Baez | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Bonderman | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Foppert | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Ford | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Fultz | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Hall | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Patterson | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Rueter | Promoted to active roster | | | Before |
| 7/1/2004 | BLU | Valdes | Demoted to reserve roster | | | Before |
| 7/1/2004 | BLU | Womack | Promoted to active roster | | | Before |
| 7/1/2004 | BOU | Martinez | Promoted to active roster | | | Before |
| 7/1/2004 | BOU | Rodriguez | Demoted to reserve roster | | | Before |
| 7/1/2004 | BST | Miller | Promoted to active roster | | | Before |
| 7/1/2004 | BST | Owens | Demoted to reserve roster | | | Before |
| 7/1/2004 | BST | Powell | Promoted to active roster | | | Before |
| 7/1/2004 | BST | Roberts,W | Demoted to reserve roster | | | Before |
| 7/1/2004 | BST | Villone | Demoted to reserve roster | | | Before |
| 7/1/2004 | BST | Villone | Promoted to active roster | | | Before |
| 7/1/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 7/1/2004 | COM | Corey | Promoted to active roster | | | Before |
| 7/1/2004 | COM | Dreifort | Demoted to reserve roster | | | Before |
| 7/1/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 7/1/2004 | FOR | Coomer | Released | | | Before |
| 7/1/2004 | FOR | Klassen | Signed | | | Before |
| 7/1/2004 | HEG | Cormier | Demoted to reserve roster | | | Before |
| 7/1/2004 | HEG | Reed | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Dessens | Promoted to active roster | | | Before |
| 7/1/2004 | HSX | Glavine,T | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Graffanino | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Hammock | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Hollandsworth | Promoted to active roster | | | Before |
| 7/1/2004 | HSX | MacDougal | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Ramirez | Demoted to reserve roster | | | Before |
| 7/1/2004 | HSX | Stephenson | Promoted to active roster | | | Before |
| 7/1/2004 | HSX | Turnbow | Promoted to active roster | | | Before |
| 7/1/2004 | HSX | Wooten | Promoted to active roster | | | Before |
| 7/1/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 7/1/2004 | SLG | Goodwin | Demoted to reserve roster | | | Before |
| 7/1/2004 | SLG | Goodwin | Promoted to active roster | | | Before |
| 7/1/2004 | SLG | Goodwin | Demoted to reserve roster | | | Before |
| 7/1/2004 | SLG | Hummel | Promoted to active roster | | | Before |
| 7/1/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 7/1/2004 | SYN | Cook | Demoted to reserve roster | | | Before |
| 7/1/2004 | SYN | Cook | Promoted to active roster | | | Before |
| 7/1/2004 | SYN | Patterson | Demoted to reserve roster | | | Before |
| 7/1/2004 | SYN | Roberts | Promoted to active roster | | | Before |
| 7/1/2004 | SYN | Tsao | Demoted to reserve roster | | | Before |
| 7/1/2004 | SYN | Wagner | Promoted to active roster | | | Before |
| 7/2/2004 | SYN | Day | Placed on disabled list | | 7/2/2004 | Before |
| 7/2/2004 | SYN | Dominguez | Promoted to active roster | | | Before |
| 7/6/2004 | ANR | Drew | Promoted to active roster | | | Before |
| 7/6/2004 | ANR | Rowand | Demoted to reserve roster | | | Before |
| 7/6/2004 | HEG | Burba | Promoted to active roster | | | Before |
| 7/6/2004 | HEG | Cormier | Promoted to active roster | | | Before |
| 7/6/2004 | HEG | Eldred | Demoted to reserve roster | | | Before |
| 7/6/2004 | HEG | White | Demoted to reserve roster | | | Before |
| 7/6/2004 | HYS | Buchanan | Traded away | SLG | | After |
| 7/6/2004 | HYS | Vina | Acquired via trade | SLG | | After |
| 7/6/2004 | SLG | Buchanan | Acquired via trade | HYS | | After |
| 7/6/2004 | SLG | Vina | Traded away | HYS | | After |
| 7/7/2004 | BOU | Acevedo | Demoted to reserve roster | | | Before |
| 7/7/2004 | BOU | Burnett | Promoted to active roster | | | Before |
| 7/7/2004 | COM | Cressend | Demoted to reserve roster | | | Before |
| 7/7/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 7/7/2004 | FOR | Baerga | Demoted to reserve roster | | | Before |
| 7/7/2004 | FOR | Leskanic | Promoted to active roster | | | Before |
| 7/7/2004 | FOR | Mantei | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Borowski | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Bradford | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Davis | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Dellucci | Promoted to active roster | | | Before |
| 7/7/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Giles | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Herges | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Johnson | Promoted to active roster | | | Before |
| 7/7/2004 | HEN | Lopez | Demoted to reserve roster | | | Before |
| 7/7/2004 | HEN | Osuna | Promoted to active roster | | | Before |
| 7/7/2004 | HEN | Rhodes | Promoted to active roster | | | Before |
| 7/7/2004 | HEN | Williamson | Promoted to active roster | | | Before |
| 7/7/2004 | HSX | Dessens | Demoted to reserve roster | | | Before |
| 7/7/2004 | HSX | Dessens | Promoted to active roster | | | Before |
| 7/7/2004 | HSX | Graffanino | Promoted to active roster | | | Before |
| 7/7/2004 | HSX | Ramirez | Promoted to active roster | | | Before |
| 7/7/2004 | HSX | Turnbow | Demoted to reserve roster | | | Before |
| 7/7/2004 | HSX | Wilson | Demoted to reserve roster | | | Before |
| 7/7/2004 | SLG | Buchanan | Promoted to active roster | | | Before |
| 7/7/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 7/7/2004 | SYN | Day | Activated from disabled list | | | Before |
| 7/8/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 7/8/2004 | SLG | Gregg | Promoted to active roster | | | Before |
| 7/9/2004 | HSX | Linden | Promoted to active roster | | | Before |
| 7/12/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 7/12/2004 | COM | Capuano | Demoted to reserve roster | | | Before |
| 7/12/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 7/12/2004 | COM | Cressend | Promoted to active roster | | | Before |
| 7/12/2004 | COM | Dreifort | Promoted to active roster | | | Before |
| 7/12/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 7/12/2004 | COM | Stewart | Promoted to active roster | | | Before |
| 7/12/2004 | COM | Weber | Acquired via trade | HEG | | After |
| 7/12/2004 | HEG | Weber | Traded away | COM | | After |
| 7/12/2004 | HEN | DeRosa | Demoted to reserve roster | | | Before |
| 7/12/2004 | HEN | Giles | Promoted to active roster | | | Before |
| 7/12/2004 | HEN | Herges | Promoted to active roster | | | Before |
| 7/12/2004 | HEN | Wilkerson | Demoted to reserve roster | | | Before |
| 7/14/2004 | ANR | Pierzynski | Demoted to reserve roster | | | Before |
| 7/14/2004 | ANR | Schneider | Promoted to active roster | | | Before |
| 7/14/2004 | BLU | Helms | Demoted to reserve roster | | | Before |
| 7/14/2004 | BLU | Patterson | Promoted to active roster | | | Before |
| 7/14/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 7/14/2004 | COM | Rosario | Released | | | Before |
| 7/14/2004 | HSX | Glavine,T | Promoted to active roster | | | Before |
| 7/14/2004 | HSX | Hammock | Promoted to active roster | | | Before |
| 7/14/2004 | HSX | Linden | Demoted to reserve roster | | | Before |
| 7/14/2004 | HSX | Stephenson | Demoted to reserve roster | | | Before |
| 7/14/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 7/14/2004 | HYS | Anderson | Demoted to reserve roster | | | Before |
| 7/14/2004 | HYS | Estalella | Demoted to reserve roster | | | Before |
| 7/14/2004 | HYS | Estalella | Promoted to active roster | | | Before |
| 7/14/2004 | HYS | Greene | Promoted to active roster | | | Before |
| 7/14/2004 | HYS | Ross | Demoted to reserve roster | | | Before |
| 7/14/2004 | HYS | Vina | Promoted to active roster | | | Before |
| 7/14/2004 | SLG | Alomar | Demoted to reserve roster | | | Before |
| 7/14/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 7/14/2004 | SLG | Gregg | Demoted to reserve roster | | | Before |
| 7/14/2004 | SYN | Bragg | Released | | | Before |
| 7/14/2004 | SYN | Lyon | Demoted to reserve roster | | | Before |
| 7/14/2004 | SYN | Robinson | Signed | | | Before |
| 7/17/2004 | BLU | Fultz | Promoted to active roster | | | Before |
| 7/17/2004 | BLU | Randolph | Placed on disabled list | | 7/16/2004 | Before |
| 7/19/2004 | SLG | Brower | Traded away | VIP | | After |
| 7/19/2004 | SLG | Smitherman | Traded away | VIP | | After |
| 7/19/2004 | SLG | Smitherman | Acquired via trade | VIP | | After |
| 7/19/2004 | SLG | Vander Wal | Acquired via trade | VIP | | After |
| 7/20/2004 | ANR | Branyan | Promoted to active roster | | | Before |
| 7/20/2004 | ANR | Burroughs | Demoted to reserve roster | | | Before |
| 7/20/2004 | ANR | Drew | Demoted to reserve roster | | | Before |
| 7/20/2004 | ANR | Mohr | Demoted to reserve roster | | | Before |
| 7/20/2004 | ANR | Mohr | Promoted to active roster | | | Before |
| 7/20/2004 | ANR | Mohr | Demoted to reserve roster | | | Before |
| 7/20/2004 | ANR | Perez | Demoted to reserve roster | | | Before |
| 7/20/2004 | ANR | Perez | Promoted to active roster | | | Before |
| 7/20/2004 | ANR | Rowand | Promoted to active roster | | | Before |
| 7/20/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Bonderman | Promoted to active roster | | | Before |
| 7/20/2004 | BLU | Foppert | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Ford | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Fultz | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Hall | Promoted to active roster | | | Before |
| 7/20/2004 | BLU | Jones | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Jones | Promoted to active roster | | | Before |
| 7/20/2004 | BLU | Quinlan | Promoted to active roster | | | Before |
| 7/20/2004 | BLU | Randolph | Activated from disabled list | | | Before |
| 7/20/2004 | BLU | Sierra | Demoted to reserve roster | | | Before |
| 7/20/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 7/20/2004 | BOU | Burnitz | Demoted to reserve roster | | | Before |
| 7/20/2004 | BOU | Burnitz | Promoted to active roster | | | Before |
| 7/20/2004 | BOU | Gomes | Promoted to active roster | | | Before |
| 7/20/2004 | BOU | Griffiths | Promoted to active roster | | | Before |
| 7/20/2004 | BOU | Penny | Demoted to reserve roster | | | Before |
| 7/20/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 7/20/2004 | COM | Dreifort | Demoted to reserve roster | | | Before |
| 7/20/2004 | FOR | Asencio | Promoted to active roster | | | Before |
| 7/20/2004 | FOR | Mantei | Promoted to active roster | | | Before |
| 7/20/2004 | FOR | Rincon | Demoted to reserve roster | | | Before |
| 7/20/2004 | FOR | Sullivan | Demoted to reserve roster | | | Before |
| 7/20/2004 | HEG | Guerrero | Activated from disabled list | | | Before |
| 7/20/2004 | HEG | Lopez,M | Demoted to reserve roster | | | Before |
| 7/20/2004 | HSX | Flaherty | Promoted to active roster | | | Before |
| 7/20/2004 | HSX | Hammock | Demoted to reserve roster | | | Before |
| 7/20/2004 | SLG | Alomar | Promoted to active roster | | | Before |
| 7/20/2004 | SLG | Bellhorn | Demoted to reserve roster | | | Before |
| 7/20/2004 | SLG | Buchanan | Demoted to reserve roster | | | Before |
| 7/20/2004 | SLG | Hummel | Demoted to reserve roster | | | Before |
| 7/20/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 7/20/2004 | SYN | Park | Demoted to reserve roster | | | Before |
| 7/20/2004 | SYN | Tsao | Promoted to active roster | | | Before |
| 7/22/2004 | BLU | Alomar | Placed on disabled list | | 7/22/2004 | Before |
| 7/22/2004 | BLU | Bennett | Promoted to active roster | | | Before |
| 7/24/2004 | SLG | Bellhorn | Promoted to active roster | | | Before |
| 7/24/2004 | SYN | Park | Promoted to active roster | | | Before |
| 7/25/2004 | ANR | Branyan | Demoted to reserve roster | | | Before |
| 7/25/2004 | ANR | Burroughs | Promoted to active roster | | | Before |
| 7/25/2004 | ANR | Drew | Promoted to active roster | | | Before |
| 7/25/2004 | ANR | Rowand | Demoted to reserve roster | | | Before |
| 7/25/2004 | BOU | Burnitz | Traded away | VIP | | After |
| 7/25/2004 | BOU | Penny | Traded away | VIP | | After |
| 7/25/2004 | BOU | Soriano | Acquired via trade | VIP | | After |
| 7/25/2004 | COM | Borowski | Acquired via trade | HEN | | After |
| 7/25/2004 | COM | Osuna | Acquired via trade | HEN | | After |
| 7/25/2004 | HEG | Mirabelli | Demoted to reserve roster | | | Before |
| 7/25/2004 | HEG | Ojeda | Promoted to active roster | | | Before |
| 7/25/2004 | HEN | DeRosa | Demoted to reserve roster | | | Before |
| 7/25/2004 | HEN | DeRosa | Promoted to active roster | | | Before |
| 7/25/2004 | HEN | Giles | Promoted to active roster | | | Before |
| 7/25/2004 | HEN | Bellhorn | Acquired via trade | SLG | | After |
| 7/25/2004 | HEN | Bordick | Traded away | SLG | | After |
| 7/25/2004 | HEN | Borowski | Traded away | COM | | After |
| 7/25/2004 | HEN | Myers | Traded away | SLG | | After |
| 7/25/2004 | HEN | Osuna | Traded away | COM | | After |
| 7/25/2004 | HSX | Grieve | Acquired via trade | VIP | | After |
| 7/25/2004 | HSX | Hollandsworth | Traded away | KAN | | After |
| 7/25/2004 | HSX | Phelps | Acquired via trade | IRI | | After |
| 7/25/2004 | HSX | Winn | Acquired via trade | KAN | | After |
| 7/25/2004 | SLG | Bellhorn | Traded away | HEN | | After |
| 7/25/2004 | SLG | Bordick | Acquired via trade | HEN | | After |
| 7/25/2004 | SLG | Myers | Acquired via trade | HEN | | After |
| 7/26/2004 | BLU | Alomar | Activated from disabled list | | | Before |
| 7/27/2004 | BLU | Bennett | Demoted to reserve roster | | | Before |
| 7/27/2004 | BLU | Hernandez | Demoted to reserve roster | | | Before |
| 7/27/2004 | BLU | Hernandez | Promoted to active roster | | | Before |
| 7/27/2004 | BLU | Quinlan | Demoted to reserve roster | | | Before |
| 7/27/2004 | BLU | Romero | Promoted to active roster | | | Before |
| 7/27/2004 | BOU | Estrella | Signed | | | Before |
| 7/27/2004 | BOU | Journell | Released | | | Before |
| 7/27/2004 | BOU | Knotts | Signed | | | Before |
| 7/27/2004 | BOU | Martinez | Released | | | Before |
| 7/27/2004 | BOU | Munro | Signed | | | Before |
| 7/27/2004 | BST | Franco | Promoted to active roster | | | Before |
| 7/27/2004 | BST | Hendrickson | Demoted to reserve roster | | | Before |
| 7/27/2004 | BST | McGriff | Demoted to reserve roster | | | Before |
| 7/27/2004 | BST | Neu | Promoted to active roster | | | Before |
| 7/27/2004 | BST | Norton | Promoted to active roster | | | Before |
| 7/27/2004 | BST | Owens | Promoted to active roster | | | Before |
| 7/27/2004 | BST | Schoeneweis | Demoted to reserve roster | | | Before |
| 7/27/2004 | BST | Villone | Promoted to active roster | | | Before |
| 7/27/2004 | BST | Vizcaino | Demoted to reserve roster | | | Before |
| 7/27/2004 | COM | Borowski | Promoted to active roster | | | Before |
| 7/27/2004 | COM | Capuano | Promoted to active roster | | | Before |
| 7/27/2004 | COM | Cressend | Demoted to reserve roster | | | Before |
| 7/27/2004 | COM | Osuna | Demoted to reserve roster | | | Before |
| 7/27/2004 | COM | Stewart | Demoted to reserve roster | | | Before |
| 7/27/2004 | FOR | Ashby | Demoted to reserve roster | | | Before |
| 7/27/2004 | FOR | Glanville | Promoted to active roster | | | Before |
| 7/27/2004 | HEN | Crudale | Signed | | | Before |
| 7/27/2004 | HEN | Fetters | Signed | | | Before |
| 7/27/2004 | HSX | Flaherty | Demoted to reserve roster | | | Before |
| 7/27/2004 | HSX | Inge | Demoted to reserve roster | | | Before |
| 7/27/2004 | HSX | Inge | Promoted to active roster | | | Before |
| 7/27/2004 | HSX | MacDougal | Released | | | Before |
| 7/27/2004 | HSX | Phelps | Demoted to reserve roster | | | Before |
| 7/27/2004 | HSX | Stewart | Released | | | Before |
| 7/27/2004 | HSX | Wilson | Demoted to reserve roster | | | Before |
| 7/27/2004 | HSX | Wilson | Promoted to active roster | | | Before |
| 7/27/2004 | HSX | Winn | Promoted to active roster | | | Before |
| 7/27/2004 | HSX | Wooten | Promoted to active roster | | | Before |
| 7/27/2004 | HYS | Mecir | Demoted to reserve roster | | | Before |
| 7/27/2004 | SLG | Clayton | Demoted to reserve roster | | | Before |
| 7/27/2004 | SLG | Martinez | Demoted to reserve roster | | | Before |
| 7/27/2004 | SYN | Day | Demoted to reserve roster | | | Before |
| 7/27/2004 | SYN | Lyon | Released | | | Before |
| 7/27/2004 | SYN | McCracken | Signed | | | Before |
| 7/27/2004 | SYN | Park | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Backe | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Branyan | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Burroughs | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Cruz | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Cruz | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Drew | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Greene | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Greene | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Guillen | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Guillen | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Hairston | Demoted to reserve roster | | | Before |
| 8/2/2004 | ANR | Hairston | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Rowand | Promoted to active roster | | | Before |
| 8/2/2004 | ANR | Veres | Promoted to active roster | | | Before |
| 8/2/2004 | BLU | Eaton | Demoted to reserve roster | | | Before |
| 8/2/2004 | BLU | Foppert | Promoted to active roster | | | Before |
| 8/2/2004 | BLU | Fultz | Promoted to active roster | | | Before |
| 8/2/2004 | BLU | Hernandez | Demoted to reserve roster | | | Before |
| 8/2/2004 | BLU | Patterson | Demoted to reserve roster | | | Before |
| 8/2/2004 | BLU | Quinlan | Promoted to active roster | | | Before |
| 8/2/2004 | BOU | Ainsworth | Demoted to reserve roster | | | Before |
| 8/2/2004 | BOU | Claussen | Demoted to reserve roster | | | Before |
| 8/2/2004 | BOU | Gomes | Demoted to reserve roster | | | Before |
| 8/2/2004 | BOU | Jackson | Released | | | Before |
| 8/2/2004 | BOU | Martin | Signed | | | Before |
| 8/2/2004 | BST | Owens | Demoted to reserve roster | | | Before |
| 8/2/2004 | COM | Corey | Released | | | Before |
| 8/2/2004 | COM | Sweeney | Released | | | Before |
| 8/2/2004 | FOR | Appier | Signed | | | Before |
| 8/2/2004 | FOR | Ashby | Released | | | Before |
| 8/2/2004 | FOR | Baerga | Released | | | Before |
| 8/2/2004 | FOR | Colyer | Signed | | | Before |
| 8/2/2004 | FOR | Laker | Released | | | Before |
| 8/2/2004 | FOR | Leskanic | Demoted to reserve roster | | | Before |
| 8/2/2004 | FOR | Mantei | Demoted to reserve roster | | | Before |
| 8/2/2004 | FOR | Neagle | Released | | | Before |
| 8/2/2004 | FOR | Robertson | Signed | | | Before |
| 8/2/2004 | FOR | Robertson | Demoted to reserve roster | | | Before |
| 8/2/2004 | FOR | Santiago | Signed | | | Before |
| 8/2/2004 | FOR | Weaver | Demoted to reserve roster | | | Before |
| 8/2/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 8/2/2004 | HSX | Wooten | Promoted to active roster | | | Before |
| 8/2/2004 | HYS | Anderson | Promoted to active roster | | | Before |
| 8/2/2004 | HYS | Carrasco | Demoted to reserve roster | | | Before |
| 8/2/2004 | HYS | Cedeno | Demoted to reserve roster | | | Before |
| 8/2/2004 | HYS | German | Released | | | Before |
| 8/2/2004 | HYS | Grimsley | Demoted to reserve roster | | | Before |
| 8/2/2004 | HYS | Hinske | Demoted to reserve roster | | | Before |
| 8/2/2004 | HYS | Jarvis | Signed | | | Before |
| 8/2/2004 | HYS | Mulholland | Signed | | | Before |
| 8/2/2004 | HYS | Nivar | Promoted to active roster | | | Before |
| 8/2/2004 | HYS | Nix | Promoted to active roster | | | Before |
| 8/2/2004 | HYS | Plesac | Released | | | Before |
| 8/2/2004 | HYS | Teixeira | Demoted to reserve roster | | | Before |
| 8/2/2004 | HYS | Teixeira | Promoted to active roster | | | Before |
| 8/2/2004 | SLG | Clayton | Promoted to active roster | | | Before |
| 8/2/2004 | SLG | Eischen | Promoted to active roster | | | Before |
| 8/2/2004 | SLG | Hummel | Released | | | Before |
| 8/2/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 8/3/2004 | SLG | Hoffman | Promoted to active roster | | | Before |
| 8/7/2004 | COM | Corey | Released | | | Before |
| 8/7/2004 | COM | Sweeney | Released | | | Before |
| 8/7/2004 | HEG | Chacon | Promoted to active roster | | | Before |
| 8/7/2004 | HEG | Harang | Demoted to reserve roster | | | Before |
| 8/7/2004 | SLG | Hummel | Released | | | Before |
| 8/9/2004 | ANR | Michaels | Demoted to reserve roster | | | Before |
| 8/9/2004 | ANR | Mohr | Promoted to active roster | | | Before |
| 8/9/2004 | BLU | Dempster | Demoted to reserve roster | | | Before |
| 8/9/2004 | BLU | Valdes | Promoted to active roster | | | Before |
| 8/9/2004 | BST | Guillen | Demoted to reserve roster | | | Before |
| 8/9/2004 | BST | Hendrickson | Promoted to active roster | | | Before |
| 8/9/2004 | BST | Myers | Demoted to reserve roster | | | Before |
| 8/9/2004 | BST | Owens | Promoted to active roster | | | Before |
| 8/9/2004 | BST | Ross | Promoted to active roster | | | Before |
| 8/9/2004 | BST | Williams | Demoted to reserve roster | | | Before |
| 8/9/2004 | COM | Beck | Demoted to reserve roster | | | Before |
| 8/9/2004 | COM | Capuano | Demoted to reserve roster | | | Before |
| 8/9/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 8/9/2004 | COM | Osuna | Promoted to active roster | | | Before |
| 8/9/2004 | HEN | Bellhorn | Demoted to reserve roster | | | Before |
| 8/9/2004 | HEN | Lopez | Promoted to active roster | | | Before |
| 8/9/2004 | HEN | Shouse | Demoted to reserve roster | | | Before |
| 8/9/2004 | HYS | Carrasco | Demoted to reserve roster | | | Before |
| 8/9/2004 | HYS | Carrasco | Promoted to active roster | | | Before |
| 8/9/2004 | HYS | Carrasco | Promoted to active roster | | | Before |
| 8/9/2004 | HYS | Estalella | Demoted to reserve roster | | | Before |
| 8/9/2004 | HYS | Roney | Demoted to reserve roster | | | Before |
| 8/9/2004 | HYS | Ross | Promoted to active roster | | | Before |
| 8/9/2004 | SLG | Clayton | Demoted to reserve roster | | | Before |
| 8/9/2004 | SLG | Eischen | Demoted to reserve roster | | | Before |
| 8/9/2004 | SLG | Hoffman | Demoted to reserve roster | | | Before |
| 8/9/2004 | SLG | Martinez | Promoted to active roster | | | Before |
| 8/9/2004 | SYN | Clark | Demoted to reserve roster | | | Before |
| 8/9/2004 | SYN | Cordero,C | Promoted to active roster | | | Before |
| 8/10/2004 | FOR | Weaver | Promoted to active roster | | | Before |
| 8/12/2004 | HEN | Davis | Promoted to active roster | | | Before |
| 8/12/2004 | HEN | Hernandez | Placed on disabled list | | 8/12/2004 | Before |
| 8/14/2004 | ANR | Branyan | Demoted to reserve roster | | | Before |
| 8/14/2004 | ANR | Burroughs | Promoted to active roster | | | Before |
| 8/14/2004 | ANR | Michaels | Promoted to active roster | | | Before |
| 8/14/2004 | ANR | Rowand | Demoted to reserve roster | | | Before |
| 8/14/2004 | BOU | Gomes | Released | | | Before |
| 8/14/2004 | BOU | Haynes | Signed | | | Before |
| 8/14/2004 | BOU | Hodges | Released | | | Before |
| 8/14/2004 | BOU | Ledezma | Signed | | | Before |
| 8/14/2004 | BOU | Merced | Signed | | | Before |
| 8/14/2004 | BOU | Perez | Released | | | Before |
| 8/14/2004 | BST | Castro | Signed | | | Before |
| 8/14/2004 | BST | Cotts | Promoted to active roster | | | Before |
| 8/14/2004 | BST | Hummel | Signed | | | Before |
| 8/14/2004 | BST | Norton | Demoted to reserve roster | | | Before |
| 8/14/2004 | BST | Powell | Demoted to reserve roster | | | Before |
| 8/14/2004 | BST | Quintero | Released | | | Before |
| 8/14/2004 | BST | Ross | Released | | | Before |
| 8/14/2004 | COM | Cressend | Promoted to active roster | | | Before |
| 8/14/2004 | COM | Stanton | Demoted to reserve roster | | | Before |
| 8/14/2004 | HSX | Flaherty | Promoted to active roster | | | Before |
| 8/14/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 8/14/2004 | SLG | Buchanan | Promoted to active roster | | | Before |
| 8/14/2004 | SLG | Martinez | Demoted to reserve roster | | | Before |
| 8/14/2004 | SYN | Clark | Released | | | Before |
| 8/14/2004 | SYN | Daubach | Signed | | | Before |
| 8/14/2004 | SYN | Jones | Signed | | | Before |
| 8/14/2004 | SYN | Kinney | Released | | | Before |
| 8/14/2004 | SYN | Merced | Released | | | Before |
| 8/14/2004 | SYN | Merced | Signed | | | Before |
| 8/14/2004 | SYN | Patterson | Promoted to active roster | | | Before |
| 8/14/2004 | SYN | Wagner | Demoted to reserve roster | | | Before |
| 8/15/2004 | BOU | Kearns | Demoted to reserve roster | | | Before |
| 8/15/2004 | FOR | Robertson | Promoted to active roster | | | Before |
| 8/15/2004 | FOR | Torres | Demoted to reserve roster | | | Before |
| 8/15/2004 | HEN | Bradford | Promoted to active roster | | | Before |
| 8/15/2004 | HEN | DeRosa | Promoted to active roster | | | Before |
| 8/15/2004 | HEN | Hammonds | Demoted to reserve roster | | | Before |
| 8/15/2004 | HEN | Herges | Demoted to reserve roster | | | Before |
| 8/15/2004 | HEN | Hernandez | Activated from disabled list | | | Before |
| 8/15/2004 | HEN | Lopez | Demoted to reserve roster | | | Before |
| 8/15/2004 | HEN | Obermueller | Demoted to reserve roster | | | Before |
| 8/15/2004 | HEN | Wilkerson | Promoted to active roster | | | Before |
| 8/15/2004 | SYN | Bay | Demoted to reserve roster | | | Before |
| 8/17/2004 | HSX | Stephenson | Promoted to active roster | | | Before |
| 8/17/2004 | HSX | Wilson | Promoted to active roster | | | Before |
| 8/19/2004 | BLU | Hernandez | Promoted to active roster | | | Before |
| 8/19/2004 | HSX | Wilson | Demoted to reserve roster | | | Before |
| 8/22/2004 | ANR | Bloomquist | Demoted to reserve roster | | | Before |
| 8/22/2004 | ANR | Branyan | Promoted to active roster | | | Before |
| 8/22/2004 | ANR | Cruz | Promoted to active roster | | | Before |
| 8/22/2004 | ANR | Greene | Promoted to active roster | | | Before |
| 8/22/2004 | ANR | Guillen | Demoted to reserve roster | | | Before |
| 8/22/2004 | ANR | Hairston | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Eaton | Promoted to active roster | | | Before |
| 8/22/2004 | BLU | Foppert | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Hall | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Hall | Promoted to active roster | | | Before |
| 8/22/2004 | BLU | Hernandez | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Mueller | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Patterson | Demoted to reserve roster | | | Before |
| 8/22/2004 | BLU | Patterson | Promoted to active roster | | | Before |
| 8/22/2004 | BLU | Patterson | Promoted to active roster | | | Before |
| 8/22/2004 | BOU | Burnett | Demoted to reserve roster | | | Before |
| 8/22/2004 | BOU | Claussen | Promoted to active roster | | | Before |
| 8/22/2004 | BOU | Scutaro | Promoted to active roster | | | Before |
| 8/22/2004 | BOU | Spivey | Demoted to reserve roster | | | Before |
| 8/22/2004 | BOU | Spivey | Promoted to active roster | | | Before |
| 8/22/2004 | BOU | Williams | Demoted to reserve roster | | | Before |
| 8/22/2004 | BST | Cotts | Demoted to reserve roster | | | Before |
| 8/22/2004 | BST | Myers | Demoted to reserve roster | | | Before |
| 8/22/2004 | BST | Myers | Promoted to active roster | | | Before |
| 8/22/2004 | BST | Myers | Promoted to active roster | | | Before |
| 8/22/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 8/22/2004 | COM | Stanton | Promoted to active roster | | | Before |
| 8/22/2004 | HSX | Colome | Demoted to reserve roster | | | Before |
| 8/22/2004 | HSX | Flaherty | Demoted to reserve roster | | | Before |
| 8/22/2004 | HSX | Hammock | Promoted to active roster | | | Before |
| 8/22/2004 | HSX | Stephenson | Demoted to reserve roster | | | Before |
| 8/22/2004 | HSX | Turnbow | Promoted to active roster | | | Before |
| 8/22/2004 | HYS | Choi | Demoted to reserve roster | | | Before |
| 8/22/2004 | HYS | Estalella | Released | | | Before |
| 8/22/2004 | HYS | Greene | Demoted to reserve roster | | | Before |
| 8/22/2004 | HYS | Hinske | Promoted to active roster | | | Before |
| 8/22/2004 | HYS | Valentin | Signed | | | Before |
| 8/22/2004 | SLG | Buchanan | Demoted to reserve roster | | | Before |
| 8/22/2004 | SLG | Eischen | Promoted to active roster | | | Before |
| 8/22/2004 | SLG | Gallo | Demoted to reserve roster | | | Before |
| 8/22/2004 | SLG | Martinez | Promoted to active roster | | | Before |
| 8/26/2004 | SYN | Kotsay | Demoted to reserve roster | | | Before |
| 8/26/2004 | SYN | Matos | Demoted to reserve roster | | | Before |
| 8/26/2004 | SYN | Roberts | Demoted to reserve roster | | | Before |
| 8/26/2004 | SYN | Wagner | Promoted to active roster | | | Before |
| 8/27/2004 | BOU | Ainsworth | Promoted to active roster | | | Before |
| 8/27/2004 | BOU | Beckett | Demoted to reserve roster | | | Before |
| 8/27/2004 | BST | Cabrera | Demoted to reserve roster | | | Before |
| 8/27/2004 | BST | Cirillo | Signed | | | Before |
| 8/27/2004 | BST | Guzman | Signed | | | Before |
| 8/27/2004 | BST | Jeter | Demoted to reserve roster | | | Before |
| 8/27/2004 | BST | Kennedy | Demoted to reserve roster | | | Before |
| 8/27/2004 | BST | Mateo | Signed | | | Before |
| 8/27/2004 | BST | McClung | Released | | | Before |
| 8/27/2004 | BST | Mussina | Demoted to reserve roster | | | Before |
| 8/27/2004 | BST | Powell | Released | | | Before |
| 8/27/2004 | BST | Roberts,W | Released | | | Before |
| 8/27/2004 | BST | Vizcaino | Promoted to active roster | | | Before |
| 8/27/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 8/27/2004 | COM | Capuano | Promoted to active roster | | | Before |
| 8/27/2004 | COM | Cressend | Demoted to reserve roster | | | Before |
| 8/27/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 8/27/2004 | HEG | Mirabelli | Promoted to active roster | | | Before |
| 8/27/2004 | HEG | Ojeda | Demoted to reserve roster | | | Before |
| 8/27/2004 | HEN | Fetters | Demoted to reserve roster | | | Before |
| 8/27/2004 | HEN | Herges | Promoted to active roster | | | Before |
| 8/27/2004 | HEN | Rhodes | Demoted to reserve roster | | | Before |
| 8/27/2004 | HEN | Shouse | Promoted to active roster | | | Before |
| 8/27/2004 | HYS | Calloway | Demoted to reserve roster | | | Before |
| 8/27/2004 | HYS | Cedeno | Promoted to active roster | | | Before |
| 8/27/2004 | HYS | Roney | Promoted to active roster | | | Before |
| 8/27/2004 | HYS | Singleton | Demoted to reserve roster | | | Before |
| 8/27/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 8/27/2004 | SLG | Martinez | Demoted to reserve roster | | | Before |
| 8/28/2004 | FOR | Foulke | Demoted to reserve roster | | | Before |
| 8/28/2004 | SYN | Harden | Promoted to active roster | | | Before |
| 8/28/2004 | SYN | Kotsay | Promoted to active roster | | | Before |
| 8/28/2004 | SYN | Matos | Promoted to active roster | | | Before |
| 8/31/2004 | BOU | Crede | Placed on disabled list | | 8/30/2004 | Before |
| 8/31/2004 | BOU | Kearns | Promoted to active roster | | | Before |
| 9/1/2004 | BLU | Bonderman | Demoted to reserve roster | | | Before |
| 9/1/2004 | BLU | Foppert | Promoted to active roster | | | Before |
| 9/2/2004 | BOU | Crede | Activated from disabled list | | | Before |
| 9/3/2004 | BLU | Bennett | Demoted to reserve roster | | | Before |
| 9/3/2004 | BLU | Bennett | Promoted to active roster | | | Before |
| 9/3/2004 | BOU | Ainsworth | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Claussen | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Etherton | Signed | | | Before |
| 9/3/2004 | BOU | Gagne | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Griffiths | Released | | | Before |
| 9/3/2004 | BOU | Heilman | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Kearns | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Martin | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | Mateo | Demoted to reserve roster | | | Before |
| 9/3/2004 | BOU | McClung | Signed | | | Before |
| 9/3/2004 | BOU | Weathers | Released | | | Before |
| 9/3/2004 | BOU | Williams | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Cabrera | Demoted to reserve roster | | | Before |
| 9/3/2004 | BST | Cabrera | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Cotts | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Guillen | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Jeter | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Kennedy | Promoted to active roster | | | Before |
| 9/3/2004 | BST | McGriff | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Mussina | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Norton | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Schoeneweis | Promoted to active roster | | | Before |
| 9/3/2004 | BST | Williams | Promoted to active roster | | | Before |
| 9/3/2004 | COM | Affeldt | Promoted to active roster | | | Before |
| 9/3/2004 | COM | Colbrunn | Promoted to active roster | | | Before |
| 9/3/2004 | COM | Gaudin | Demoted to reserve roster | | | Before |
| 9/3/2004 | COM | Melhuse | Promoted to active roster | | | Before |
| 9/3/2004 | COM | Stewart | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | DeJean | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Eldred | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Good | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Hitchcock | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Lopez,M | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Miles | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | Ojeda | Promoted to active roster | | | Before |
| 9/3/2004 | HEG | White | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Colome | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Flaherty | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Grieve | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Linden | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Phelps | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Ruan | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Stephenson | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Wilson | Promoted to active roster | | | Before |
| 9/3/2004 | HSX | Wooten | Promoted to active roster | | | Before |
| 9/3/2004 | HYS | Calloway | Promoted to active roster | | | Before |
| 9/3/2004 | HYS | Choi | Promoted to active roster | | | Before |
| 9/3/2004 | HYS | Singleton | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Clayton | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Gallo | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Goodwin | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Gregg | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Martinez | Promoted to active roster | | | Before |
| 9/3/2004 | SLG | Wells | Demoted to reserve roster | | | Before |
| 9/3/2004 | SYN | Bay | Promoted to active roster | | | Before |
| 9/3/2004 | SYN | Day | Promoted to active roster | | | Before |
| 9/3/2004 | SYN | DeJesus | Promoted to active roster | | | Before |
| 9/3/2004 | SYN | Dominguez | Demoted to reserve roster | | | Before |
| 9/3/2004 | SYN | German | Demoted to reserve roster | | | Before |
| 9/3/2004 | SYN | German | Promoted to active roster | | | Before |
| 9/3/2004 | SYN | German | Demoted to reserve roster | | | Before |
| 9/3/2004 | SYN | Matos | Demoted to reserve roster | | | Before |
| 9/3/2004 | SYN | Weeks | Promoted to active roster | | | Before |
| 9/5/2004 | SYN | DeJesus | Demoted to reserve roster | | | Before |
| 9/5/2004 | SYN | Harden | Demoted to reserve roster | | | Before |
| 9/5/2004 | SYN | Kotsay | Demoted to reserve roster | | | Before |
| 9/7/2004 | ANR | Drew | Promoted to active roster | | | Before |
| 9/7/2004 | ANR | Hairston | Promoted to active roster | | | Before |
| 9/7/2004 | ANR | Jackson | Promoted to active roster | | | Before |
| 9/7/2004 | ANR | Pierzynski | Promoted to active roster | | | Before |
| 9/7/2004 | ANR | Rowand | Promoted to active roster | | | Before |
| 9/7/2004 | ANR | Sandberg | Promoted to active roster | | | Before |
| 9/7/2004 | BOU | Etherton | Signed | | | Before |
| 9/7/2004 | BOU | Griffiths | Released | | | Before |
| 9/7/2004 | BOU | McClung | Signed | | | Before |
| 9/7/2004 | BOU | Weathers | Released | | | Before |
| 9/7/2004 | FOR | Beltran | Demoted to reserve roster | | | Before |
| 9/7/2004 | FOR | DiFelice | Demoted to reserve roster | | | Before |
| 9/7/2004 | FOR | Neal | Promoted to active roster | | | Before |
| 9/7/2004 | FOR | Nunez | Promoted to active roster | | | Before |
| 9/7/2004 | FOR | Stark | Promoted to active roster | | | Before |
| 9/7/2004 | FOR | Sweeney | Demoted to reserve roster | | | Before |
| 9/7/2004 | FOR | Sweeney | Promoted to active roster | | | Before |
| 9/7/2004 | FOR | Torres | Promoted to active roster | | | Before |
| 9/7/2004 | HEG | Mirabelli | Demoted to reserve roster | | | Before |
| 9/7/2004 | SYN | Cook | Demoted to reserve roster | | | Before |
| 9/7/2004 | SYN | Cordero,C | Demoted to reserve roster | | | Before |
| 9/7/2004 | SYN | Day | Demoted to reserve roster | | | Before |
| 9/7/2004 | SYN | Tsao | Demoted to reserve roster | | | Before |
| 9/7/2004 | SYN | Wagner | Demoted to reserve roster | | | Before |
| 9/8/2004 | ANR | Backe | Promoted to active roster | | | Before |
| 9/8/2004 | ANR | Bloomquist | Promoted to active roster | | | Before |
| 9/8/2004 | ANR | Guillen | Promoted to active roster | | | Before |
| 9/8/2004 | ANR | Michaels | Demoted to reserve roster | | | Before |
| 9/8/2004 | BLU | Bennett | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Berg | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Bonderman | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Dempster | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Hall | Demoted to reserve roster | | | Before |
| 9/8/2004 | BLU | Helms | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Hernandez | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Mueller | Promoted to active roster | | | Before |
| 9/8/2004 | BLU | Romero | Demoted to reserve roster | | | Before |
| 9/8/2004 | BLU | Sierra | Promoted to active roster | | | Before |
| 9/8/2004 | BOU | Hackman | Signed | | | Before |
| 9/8/2004 | BOU | Heilman | Released | | | Before |
| 9/8/2004 | BOU | Martin | Promoted to active roster | | | Before |
| 9/8/2004 | BOU | Mateo | Released | | | Before |
| 9/8/2004 | BOU | Tatis | Signed | | | Before |
| 9/8/2004 | BOU | Wheeler | Promoted to active roster | | | Before |
| 9/8/2004 | BST | Cotts | Demoted to reserve roster | | | Before |
| 9/8/2004 | BST | Fox | Demoted to reserve roster | | | Before |
| 9/8/2004 | BST | Guillen | Demoted to reserve roster | | | Before |
| 9/8/2004 | BST | Jeter | Demoted to reserve roster | | | Before |
| 9/8/2004 | BST | McGriff | Demoted to reserve roster | | | Before |
| 9/8/2004 | BST | Williams | Demoted to reserve roster | | | Before |
| 9/8/2004 | HYS | Garland | Demoted to reserve roster | | | Before |
| 9/8/2004 | HYS | Ross | Demoted to reserve roster | | | Before |
| 9/8/2004 | HYS | Wilson | Demoted to reserve roster | | | Before |
| 9/8/2004 | SLG | Alomar | Demoted to reserve roster | | | Before |
| 9/8/2004 | SLG | Buchanan | Promoted to active roster | | | Before |
| 9/8/2004 | SLG | Hoffman | Promoted to active roster | | | Before |
| 9/8/2004 | SLG | Larkin | Demoted to reserve roster | | | Before |
| 9/8/2004 | SLG | Larson | Released | | | Before |
| 9/8/2004 | SLG | Lockhart | Signed | | | Before |
| 9/8/2004 | SLG | Pellow | Promoted to active roster | | | Before |
| 9/8/2004 | SLG | Prior | Demoted to reserve roster | | | Before |
| 9/8/2004 | SYN | Borland | Signed | | | Before |
| 9/8/2004 | SYN | Cust | Released | | | Before |
| 9/8/2004 | SYN | Harris | Signed | | | Before |
| 9/8/2004 | SYN | McDonald | Released | | | Before |
| 9/8/2004 | SYN | Roberts | Released | | | Before |
| 9/8/2004 | SYN | Robinson | Released | | | Before |
| 9/8/2004 | SYN | Sadler | Signed | | | Before |
| 9/8/2004 | SYN | Wagner | Promoted to active roster | | | Before |
| 9/8/2004 | SYN | Wilson | Signed | | | Before |
| 9/12/2004 | ANR | Greene | Demoted to reserve roster | | | Before |
| 9/12/2004 | ANR | Morris | Demoted to reserve roster | | | Before |
| 9/12/2004 | COM | Cressend | Promoted to active roster | | | Before |
| 9/12/2004 | COM | Lewis | Promoted to active roster | | | Before |
| 9/12/2004 | SLG | Alomar | Promoted to active roster | | | Before |
| 9/12/2004 | SLG | Buchanan | Demoted to reserve roster | | | Before |
| 9/12/2004 | SLG | Donnelly | Demoted to reserve roster | | | Before |
| 9/12/2004 | SLG | Isringhausen | Demoted to reserve roster | | | Before |
| 9/12/2004 | SLG | Kida | Signed | | | Before |
| 9/12/2004 | SLG | Myers | Demoted to reserve roster | | | Before |
| 9/12/2004 | SLG | Pellow | Released | | | Before |
| 9/12/2004 | SLG | Wells | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Bay | Demoted to reserve roster | | | Before |
| 9/12/2004 | SYN | Cook | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Cordero,C | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Day | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Jones | Released | | | Before |
| 9/12/2004 | SYN | Kotsay | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Matos | Promoted to active roster | | | Before |
| 9/12/2004 | SYN | Soriano | Demoted to reserve roster | | | Before |
| 9/12/2004 | SYN | Taylor | Signed | | | Before |
| 9/12/2004 | SYN | Wagner | Demoted to reserve roster | | | Before |
| 9/12/2004 | SYN | Weeks | Demoted to reserve roster | | | Before |
| 9/14/2004 | BLU | Romero | Promoted to active roster | | | Before |
| 9/14/2004 | BOU | Martin | Released | | | Before |
| 9/14/2004 | BOU | Torres | Signed | | | Before |
| 9/14/2004 | BOU | Wheeler | Demoted to reserve roster | | | Before |
| 9/14/2004 | BST | Anderson | Demoted to reserve roster | | | Before |
| 9/14/2004 | HEG | Adams | Demoted to reserve roster | | | Before |
| 9/14/2004 | HEG | Miles | Demoted to reserve roster | | | Before |
| 9/14/2004 | HEN | Bellhorn | Promoted to active roster | | | Before |
| 9/14/2004 | HEN | Herges | Demoted to reserve roster | | | Before |
| 9/14/2004 | HEN | Lopez | Promoted to active roster | | | Before |
| 9/14/2004 | HEN | McMillon | Promoted to active roster | | | Before |
| 9/14/2004 | HEN | Williamson | Demoted to reserve roster | | | Before |
| 9/14/2004 | HSX | Turnbow | Demoted to reserve roster | | | Before |
| 9/14/2004 | HYS | Garland | Promoted to active roster | | | Before |
| 9/14/2004 | HYS | Grimsley | Promoted to active roster | | | Before |
| 9/14/2004 | HYS | Wilson | Demoted to reserve roster | | | Before |
| 9/14/2004 | HYS | Wilson | Promoted to active roster | | | Before |
| 9/14/2004 | SLG | Kida | Signed | | | Before |
| 9/14/2004 | SLG | Pellow | Released | | | Before |
| 9/16/2004 | BST | Hummel | Demoted to reserve roster | | | Before |
| 9/18/2004 | FOR | Colyer | Demoted to reserve roster | | | Before |
| 9/18/2004 | FOR | Leskanic | Promoted to active roster | | | Before |
| 9/18/2004 | FOR | Sweeney | Demoted to reserve roster | | | Before |
| 9/18/2004 | FOR | Witasick | Demoted to reserve roster | | | Before |
| 9/18/2004 | HEG | Burba | Demoted to reserve roster | | | Before |
| 9/19/2004 | BOU | Burnett | Promoted to active roster | | | Before |
| 9/19/2004 | BOU | Claussen | Promoted to active roster | | | Before |
| 9/19/2004 | BOU | Crede | Demoted to reserve roster | | | Before |
| 9/19/2004 | BOU | Johnson | Demoted to reserve roster | | | Before |
| 9/19/2004 | BOU | Scutaro | Demoted to reserve roster | | | Before |
| 9/19/2004 | BOU | Williams | Demoted to reserve roster | | | Before |
| 9/19/2004 | BST | Anderson | Promoted to active roster | | | Before |
| 9/19/2004 | BST | Guillen | Promoted to active roster | | | Before |
| 9/19/2004 | BST | Jeter | Promoted to active roster | | | Before |
| 9/19/2004 | BST | Kennedy | Demoted to reserve roster | | | Before |
| 9/19/2004 | COM | Moreno | Promoted to active roster | | | Before |
| 9/19/2004 | FOR | Asencio | Demoted to reserve roster | | | Before |
| 9/19/2004 | FOR | Ortiz | Demoted to reserve roster | | | Before |
| 9/19/2004 | FOR | Santiago | Demoted to reserve roster | | | Before |
| 9/19/2004 | FOR | Weaver | Demoted to reserve roster | | | Before |
| 9/19/2004 | FOR | Weaver | Promoted to active roster | | | Before |
| 9/19/2004 | HEN | Bellhorn | Demoted to reserve roster | | | Before |
| 9/19/2004 | HEN | Herges | Promoted to active roster | | | Before |
| 9/19/2004 | HEN | Hernandez | Demoted to reserve roster | | | Before |
| 9/19/2004 | HEN | Hernandez | Promoted to active roster | | | Before |
| 9/19/2004 | HEN | Padilla | Demoted to reserve roster | | | Before |
| 9/19/2004 | HEN | Piatt | Demoted to reserve roster | | | Before |
| 9/19/2004 | HEN | Rhodes | Promoted to active roster | | | Before |
| 9/19/2004 | HEN | Schmidt | Demoted to reserve roster | | | Before |
| 9/19/2004 | HEN | Vogelsong | Promoted to active roster | | | Before |
| 9/19/2004 | HSX | Schilling | Demoted to reserve roster | | | Before |
| 9/19/2004 | HSX | Turnbow | Promoted to active roster | | | Before |
| 9/19/2004 | HYS | Carrasco | Demoted to reserve roster | | | Before |
| 9/19/2004 | HYS | Westbrook | Demoted to reserve roster | | | Before |
| 9/19/2004 | HYS | Wilson | Promoted to active roster | | | Before |
| 9/19/2004 | SLG | Gregg | Demoted to reserve roster | | | Before |
| 9/19/2004 | SLG | Prior | Promoted to active roster | | | Before |
| 9/19/2004 | SLG | Quantrill | Demoted to reserve roster | | | Before |
| 9/19/2004 | SYN | Alvarez | Signed | | | Before |
| 9/19/2004 | SYN | Borland | Released | | | Before |
| 9/19/2004 | SYN | Phillips,B | Demoted to reserve roster | | | Before |
| 9/21/2004 | BOU | Burnett | Demoted to reserve roster | | | Before |
| 9/21/2004 | SLG | Hasegawa | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Bennett | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Berg | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Dempster | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Fultz | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Fultz | Promoted to active roster | | | Before |
| 9/23/2004 | BLU | Higginson | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Osuna | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Perez | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Quinlan | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Randolph | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Valdes | Demoted to reserve roster | | | Before |
| 9/23/2004 | BLU | Womack | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | ANKIEL | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Claussen | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Gomes | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Heilman | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Hodges | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Journell | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Mateo | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | Perez | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | RAUCH | Demoted to reserve roster | | | Before |
| 9/23/2004 | BOU | SNELLING | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Affeldt | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Beck | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Colbrunn | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Colbrunn | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Corey | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Corey | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Cressend | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Edmonds | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Escobar | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Escobar | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Escobar | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Fossum | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Gaudin | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Giambi | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Grabowski | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Grabowski | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Jones,C | Promoted to active roster | | | Before |
| 9/23/2004 | COM | Lewis | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Lewis | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Melhuse | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Melhuse | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Moreno | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Moreno | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Osuna | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Stewart | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Stewart | Demoted to reserve roster | | | Before |
| 9/23/2004 | COM | Wright | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Flaherty | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Grieve | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Linden | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Phelps | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Ruan | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Schilling | Promoted to active roster | | | Before |
| 9/23/2004 | HSX | Stephenson | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Turnbow | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Wilson | Demoted to reserve roster | | | Before |
| 9/23/2004 | HSX | Wooten | Demoted to reserve roster | | | Before |
| 9/23/2004 | HYS | Clayton | Traded away | SLG | | After |
| 9/23/2004 | HYS | Pulido | Acquired via trade | SLG | | After |
| 9/23/2004 | SLG | Counsell | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Elarton | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Gallo | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Hessman | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Hoffman | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | House | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Larson | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Pellow | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Rosario | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Vina | Demoted to reserve roster | | | Before |
| 9/23/2004 | SLG | Clayton | Acquired via trade | HYS | | After |
| 9/23/2004 | SLG | Pulido | Traded away | HYS | | After |
| 9/25/2004 | COM | Dreifort | Promoted to active roster | | | Before |
| 9/25/2004 | COM | Pavano | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Adams | Promoted to active roster | | | Before |
| 9/25/2004 | HEG | Burba | Promoted to active roster | | | Before |
| 9/25/2004 | HEG | DeJean | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Good | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Hitchcock | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Lopez,M | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Lopez,M | Promoted to active roster | | | Before |
| 9/25/2004 | HEG | Mirabelli | Promoted to active roster | | | Before |
| 9/25/2004 | HEG | Ojeda | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Oliver | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | Silva | Demoted to reserve roster | | | Before |
| 9/25/2004 | HEG | White | Demoted to reserve roster | | | Before |
| 9/25/2004 | HSX | Glavine,T | Demoted to reserve roster | | | Before |
| 9/25/2004 | HSX | Stephenson | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Buchanan | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Clayton | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Donnelly | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Eischen | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Gallo | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Hasegawa | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Hoffman | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Isringhausen | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Kida | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Larkin | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Lockhart | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Lohse | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Martinez | Demoted to reserve roster | | | Before |
| 9/25/2004 | SLG | Myers | Promoted to active roster | | | Before |
| 9/25/2004 | SLG | Quantrill | Promoted to active roster | | | Before |
| 9/28/2004 | HSX | Grieve | Promoted to active roster | | | Before |
| 10/5/2004 | SLG | Buchanan | Demoted to reserve roster | | | Before |
| 10/5/2004 | SLG | Buchanan | Demoted to reserve roster | | | Before |
| 10/5/2004 | SLG | Eischen | Promoted to active roster | | | Before |
| 10/5/2004 | SLG | Eischen | Promoted to active roster | | | Before |