Orioles Roster & Staff
Transactions
| Date | Transaction |
| 08/31/11 | Baltimore Orioles traded LHP Michael Gonzalez to Texas Rangers for Player To Be Named Later. |
| 08/31/11 | Baltimore Orioles optioned LHP Mark Hendrickson to Norfolk Tides. |
| 08/31/11 | Baltimore Orioles sent Mitch Atkins outright to Norfolk Tides. |
| 08/31/11 | Baltimore Orioles sent Mike Ballard outright to Bowie Baysox. |
| 08/31/11 | Baltimore Orioles recalled Zach Phillips from Norfolk Tides. |
| 08/31/11 | Baltimore Orioles traded LHP Michael Gonzalez to Texas Rangers for Player To Be Named Later. |
| 08/30/11 | Baltimore Orioles designated Mark Hendrickson for assignment. |
| 08/30/11 | Baltimore Orioles activated LHP Troy Patton from the restricted list. |
| 08/28/11 | Baltimore Orioles placed LHP Troy Patton on the restricted list. |
| 08/28/11 | Baltimore Orioles recalled LHP Mark Hendrickson from Norfolk Tides. |
| 08/25/11 | Baltimore Orioles sent LF Felix Pie outright to Norfolk Tides. |
| 08/23/11 | Baltimore Orioles selected the contract of Jake Fox from Norfolk Tides. |
| 08/23/11 | Baltimore Orioles recalled CF Matt Angle from Norfolk Tides. |
| 08/23/11 | Baltimore Orioles optioned 2B Blake Davis to Norfolk Tides. |
| 08/23/11 | Baltimore Orioles designated Felix Pie for assignment. |
| 08/22/11 | Baltimore Orioles recalled Ryan Adams from Norfolk Tides. |
| 08/22/11 | Baltimore Orioles optioned Josh Bell to Norfolk Tides. |
| 08/22/11 | Baltimore Orioles activated LHP Zach Britton from the 15-day disabled list. |
| 08/22/11 | Baltimore Orioles placed RHP Jason Berken on the 15-day disabled list retroactive to August 18, 2011. Right forearm strain |
| 08/19/11 | IF Ryan Zrenda assigned to Aberdeen IronBirds from Baltimore Orioles. |
| 08/18/11 | Baltimore Orioles sent Luis Lebron outright to Aberdeen IronBirds. |
| 08/18/11 | Baltimore Orioles signed free agent IF Ryan Zrenda to a minor league contract. |
| 08/16/11 | Baltimore Orioles recalled Brian Matusz from Norfolk Tides. |
| 08/16/11 | Baltimore Orioles placed 1B Chris Davis on the 15-day disabled list retroactive to August 15, 2011. Right shoulder strain |
| 08/16/11 | Baltimore Orioles designated Luis Lebron for assignment. |
| 08/15/11 | Baltimore Orioles signed RHP Jason McCracken. |
| 08/15/11 | Baltimore Orioles signed RHP Dylan Bundy. |
| 08/15/11 | Baltimore Orioles signed 3B Jason Esposito. |
| 08/15/11 | Baltimore Orioles signed RHP Zach Davies. |
| 08/15/11 | Baltimore Orioles signed 3B Nick Delmonico. |
| 08/12/11 | Baltimore Orioles transferred RHP Jake Arrieta from the 15-day disabled list to the 60-day disabled list. |
| 08/12/11 | Baltimore Orioles optioned RHP Chris Tillman to Norfolk Tides. |
| 08/12/11 | Baltimore Orioles selected the contract of RHP Willie Eyre from Norfolk Tides. |
| 08/10/11 | Baltimore Orioles signed free agent LHP Matt Wilson to a minor league contract. |
| 08/10/11 | Baltimore Orioles sent RHP Brandon Erbe outright to Aberdeen IronBirds. |
| 08/08/11 | Baltimore Orioles recalled Jason Berken from Norfolk Tides. |
| 08/08/11 | Baltimore Orioles placed SS Cesar Izturis on the 15-day disabled list. Left groin strain. |
| 08/06/11 | Baltimore Orioles placed RHP Jake Arrieta on the 15-day disabled list retroactive to August 1, 2011. Bone spur in his right elbow. |
| 08/06/11 | Baltimore Orioles signed OF John Ruettiger. |
| 08/06/11 | Baltimore Orioles recalled Chris Tillman from Norfolk Tides. |
| 08/05/11 | Willie Eyre assigned to Norfolk Tides from Baltimore Orioles. |
| 08/05/11 | Baltimore Orioles designated Brandon Erbe for assignment. |
| 08/05/11 | Baltimore Orioles activated SS Cesar Izturis from the 60-day disabled list. |
| 08/05/11 | Zach Britton roster status changed by Baltimore Orioles. |
| 08/05/11 | Baltimore Orioles placed LHP Zach Britton on the 15-day disabled list. Left Shoulder Strain |
| 08/04/11 | Baltimore Orioles signed free agent RHP Willie Eyre to a minor league contract. |
| 08/03/11 | Baltimore Orioles activated LHP Jo-Jo Reyes. |
| 08/03/11 | Baltimore Orioles optioned Mark Hendrickson to Norfolk Tides. |
| 08/02/11 | Brad Bergesen roster status changed by Baltimore Orioles. |
| 08/02/11 | Baltimore Orioles signed free agent 1B Gelfry Perez to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent RHP Cristian Alvarado to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent OF Rochendrick Alexander to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent SS Jacniel Cabrera to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent OF Brailyn Duran to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent RHP Elvis Duran to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent C Daniel Fajardo to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent RHP Wendell Floranus to a minor league contract. |
| 08/02/11 | Baltimore Orioles signed free agent RHP Francisco Jimenez to a minor league contract. |
| 08/02/11 | Baltimore Orioles claimed LHP Jo-Jo Reyes off waivers from Toronto Blue Jays. |
| 08/02/11 | Baltimore Orioles transferred LF Luke Scott from the 15-day disabled list to the 60-day disabled list. |
| 08/01/11 | Baltimore Orioles optioned LHP Mike Ballard to Bowie Baysox. |
| 08/01/11 | Baltimore Orioles optioned LHP Pedro Viola to Bowie Baysox. |
| 08/01/11 | Baltimore Orioles released RHP Justin Duchscherer. |