Transactions| Date | Transaction | |||
| 5/31/04 | Acquired INF Damian Jackson from the Cubs for INF Gookie Dawkins and a player to be named later. | |||
| 5/28/04 | Reinstated INF Tony Graffanino from the 15-day disabled list and designated INF Mendy Lopez for assignment. | |||
| 5/27/04 | Placed OF Juan Gonzalez on the 15-day disabled list with a muscle strain in his back. Recalled OF Byron Gettis from Triple-A Omaha. | |||
| 5/26/04 | OF Adrian Brown cleared waivers and accepted an assignment to Triple-A Omaha. RHP Eduardo Villacis was claimed by the White Sox and was placed on their Double-A Birmingham roster. | |||
| 5/22/04 | Purchased the contract of RHP Zack Greinke from Triple-A Omaha. Optioned RHP Shawn Camp to Triple-A Omaha. RHP Eduardo Villacis was designated for assignment. | |||
| 5/21/04 | Purchased the contract of OF Brandon Berger from Triple-A Omaha; designated OF Adrian Brown for assignment. | |||
| 5/16/04 | Placed OF Aaron Guiel on the 15-day disabled list with blurred vision in his left eye. Purchased the contract of INF Wilton Guerrero from Triple-A Omaha. Designated RHP Joe Dawley for assignment. | |||
| 5/11/04 | Purchased the contract of outfielder Adrian Brown from Triple-A Omaha. Transferred RHP Kyle Snyder from the 15-day to the 60-day disabled list. | |||
| Optioned RHP Mike MacDougal and OF David DeJesus to Triple-A Omaha. Recalled RHP Justin Huisman and purchased the contract of OF Adrian Brown from Triple-A Omaha. | ||||
| 5/7/04 | Signed SS Angel Berroa to a four-year contract extension with a one-year club option. The deal could be worth a total of $16 million. | |||
| 5/3/04 | Optioned RHP Eduardo Villacis to Double-A Wichita and recalled LHP Jaime Cerda from Triple-A Omaha. | |||
| 5/1/04 | Reinstated SS Angel Berroa from the 15-day DL; purchased the contract of RHP Eduardo Villacis from Double-A Wichita; optioned RHP Justin Huisman to Triple-A Omaha and placed INF Tony Graffanino on the 15-day DL. | |||