| Transactions | ||||||
| Date | Team | Player | Type | OthTm | EffDate | When |
| 5/9/1989 | MUL | Roomes | Traded away | WIZ | After | |
| 5/9/1989 | MUL | Tudor | Acquired via trade | WIZ | After | |
| 5/9/1989 | WIZ | Roomes | Acquired via trade | MUL | After | |
| 5/9/1989 | WIZ | Tudor | Traded away | MUL | After | |
| 5/16/1989 | COL | McWilliams | Demoted to reserve roster | Before | ||
| 5/16/1989 | COL | Sanderson | Promoted to active roster | Before | ||
| 5/16/1989 | MUL | Moseby | Promoted to active roster | Before | ||
| 7/20/1989 | CRH | Slaught | Acquired via trade | GEO | After | |
| 7/20/1989 | CRH | Smith,D | Traded away | GEO | After | |
| 8/1/1989 | CRH | Benes | Acquired via trade | Pal | After | |
| 8/1/1989 | CRH | Daniels | Acquired via trade | Pal | After | |
| 8/1/1989 | CRH | Fraser | Traded away | Pal | After | |
| 8/1/1989 | CRH | Saberhagen | Traded away | Pal | After | |
| 8/2/1989 | COP | Hibbard | Promoted to active roster | Before | ||
| 8/2/1989 | COP | Rogers | Demoted to reserve roster | Before | ||
| 8/2/1989 | TON | Aldrete | Demoted to reserve roster | Before | ||
| 8/2/1989 | WIZ | Carter | Demoted to reserve roster | Before | ||
| 8/2/1989 | WIZ | Hassey | Signed | Before | ||
| 8/2/1989 | WIZ | Kingery | Demoted to reserve roster | Before | ||
| 1/29/2024 | CRH | Ray | Traded away | Pal | After | |
| 1/29/2024 | CRH | Smith,D | Acquired via trade | Pal | After | |