| Date | Transaction | |||
| 4/23/04 | Signed OF Andres Torres to a minor league contract. | |||
| 4/22/04 | Oakland claimed C Michael Rivera off waivers. | |||
| 4/20/04 | Placed SS Jose Valentin on the 15-day disabled list (retroactive to April 19) with a pulled left hamstring; purchased the contract of INF Kelly Dransfeldt from Triple-A Charlotte. | |||
| 4/3/04 | Optioned C Jamie Burke to Triple-A Charlotte. | |||
| Purchased the contract of RHP Mike Jackson from Triple-A Charlotte. | ||||
| 4/2/04 | Placed LHP Kelly Wunsch on the 15-day disabled list (retroactive to March 31) with an inflamed left teres minor muscle. | |||
| 4/1/04 | Optioned RHP Jason Grilli to Triple-A Charlotte. | |||
