Orioles Roster & Staff
Transactions
| Date | Transaction |
| 02/29/12 | Baltimore Orioles signed free agent RHP Josh Banks to a minor league contract. |
| 02/28/12 | Baltimore Orioles signed free agent RHP Miguel Gonzalez to a minor league contract. |
| 02/27/12 | Baltimore Orioles signed free agent RHP Bobby Wilkins to a minor league contract. |
| 02/24/12 | Baltimore Orioles signed free agent C Neomar Magallanes to a minor league contract. |
| 02/24/12 | Baltimore Orioles signed free agent RHP Yanuel Cuevas to a minor league contract. |
| 02/24/12 | Baltimore Orioles signed free agent SS Sergio Lamas to a minor league contract. |
| 02/24/12 | Baltimore Orioles signed free agent C Alexander Labrador to a minor league contract. |
| 02/23/12 | Baltimore Orioles signed free agent LHP Yi-Hsiang Lin to a minor league contract. |
| 02/23/12 | Baltimore Orioles signed free agent C Josh Johnson to a minor league contract. |
| 02/23/12 | Baltimore Orioles signed free agent C Bobby Dombrowski to a minor league contract. |
| 02/23/12 | Los Angeles Dodgers claimed Matt Angle off waivers from Baltimore Orioles. |
| 02/22/12 | Baltimore Orioles signed free agent RHP Josh Worrell to a minor league contract. |
| 02/14/12 | Baltimore Orioles released LHP Clay Rapada. |
| 02/10/12 | Baltimore Orioles designated Matt Angle for assignment. |
| 02/10/12 | Baltimore Orioles signed free agent RHP Greg Burke to a minor league contract. |
| 02/10/12 | Baltimore Orioles signed free agent Luis Ayala. |
| 02/10/12 | Baltimore Orioles invited non-roster LF L.J. Hoes to spring training. |
| 02/10/12 | Baltimore Orioles invited non-roster CF Xavier Avery to spring training. |
| 02/10/12 | Baltimore Orioles signed free agent Nick Johnson. |
| 02/10/12 | 1B Nick Johnson roster status changed by Baltimore Orioles. |
| 02/07/12 | Baltimore Orioles signed free agent Jeff Larish. |
| 02/07/12 | Baltimore Orioles signed free agent LHP Casey Fossum to a minor league contract. |
| 02/06/12 | Baltimore Orioles traded RHP Jeremy Guthrie to Colorado Rockies for RHP Jason Hammel and RHP Matt Lindstrom. |
| 02/06/12 | Baltimore Orioles traded RHP Jeremy Guthrie to Colorado Rockies for RHP Jason Hammel and RHP Matt Lindstrom. |
| 02/06/12 | Baltimore Orioles designated LHP Clay Rapada for assignment. |
| 02/06/12 | Baltimore Orioles traded RHP Jeremy Guthrie to Colorado Rockies for RHP Jason Hammel and RHP Matt Lindstrom. |
| 02/04/12 | Baltimore Orioles signed free agent OF Andres Aguilar to a minor league contract. |
| 02/03/12 | Baltimore Orioles signed free agent RHP Stu Pomeranz to a minor league contract. |
| 02/01/12 | Baltimore Orioles signed free agent 2B Chris Tremblay to a minor league contract. |
| 02/01/12 | Baltimore Orioles released RHP Rick van den Hurk. |