| Date | Transaction | |||
| 12/18/08 | Signed C Matt Treanor to a one-year contract. | |||
| 12/15/08 | Signed SS Adam Everett to a one-year contract. | |||
| 12/12/08 | Signed INF Ramon Santiago to a one-year contract. Non-tendered RHP Aquilino Lopez. | |||
| 12/11/08 | Selected LHP Kyle Bloom from the Pittsburgh Pirates in the Rule 5 draft. | |||
| 12/10/08 | Acquired RHP Edwin Jackson from the Tampa Bay Rays for OF Matt Joyce. | |||
| 12/8/08 | Acquired C Gerald Laird from the Texas Rangers for RHP Guillermo Moscoso and RHP Carlos Melo. | |||
| 12/1/08 | Declined to offer salary arbitration to SS Edgar Renteria. | |||
