Orioles Roster & Staff
Transactions
| Date | Transaction |
| 12/28/11 | Baltimore Orioles signed free agent RHP Jon Link to a minor league contract and invited him to spring training. |
| 12/20/11 | Baltimore Orioles signed free agent LF Endy Chavez. |
| 12/19/11 | Baltimore Orioles signed free agent RHP Raul Rivero to a minor league contract. |
| 12/16/11 | Baltimore Orioles signed free agent CF Antoan Richardson to a minor league contract. |
| 12/16/11 | Baltimore Orioles signed free agent 3B Carlos R Rojas to a minor league contract. |
| 12/16/11 | Baltimore Orioles signed free agent LF Lee Cruz to a minor league contract. |
| 12/15/11 | Baltimore Orioles signed free agent RHP Eunchul Choi to a minor league contract. |
| 12/14/11 | Baltimore Orioles signed free agent LHP Ryan Edell to a minor league contract. |
| 12/14/11 | Baltimore Orioles signed free agent LHP Tsuyoshi Wada. |
| 12/13/11 | Baltimore Orioles signed free agent OF Carlos Larez to a minor league contract. |
| 12/12/11 | RHP Willie Eyre elected free agency. |
| 12/12/11 | LHP Jo-Jo Reyes elected free agency. |
| 12/12/11 | LF Luke Scott elected free agency. |
| 12/08/11 | Baltimore Orioles claimed 3B Ryan Flaherty off waivers from Iowa Cubs. |
| 12/08/11 | Los Angeles Dodgers Traded LHP Dana Eveland to Baltimore Orioles; Norfolk Tides Traded LF Tyler Henson to Albuquerque Isotopes and Delmarva Shorebirds Traded LHP Jarret Martin to Rancho Cucamonga Quakes. |
| 12/08/11 | Baltimore Orioles designated RHP Willie Eyre for assignment. |
| 12/06/11 | Baltimore Orioles signed free agent C Kelvin Mena to a minor league contract. |
| 12/05/11 | Minnesota Twins claimed Pedro Florimon off waivers from Baltimore Orioles. |
| 12/05/11 | Baltimore Orioles sent Pedro Viola outright to Norfolk Tides. |
| 12/01/11 | Baltimore Orioles designated Pedro Viola for assignment. |
| 12/01/11 | Texas Rangers Traded C Taylor Teagarden to Baltimore Orioles and Delmarva Shorebirds Traded RHP Randy Henry to Myrtle Beach Pelicans. |