| 7/1/12 |
Baltimore Orioles optioned RHP Tommy Hunter to Norfolk Tides. |
| 7/1/12 |
Baltimore Orioles optioned Xavier Avery to Norfolk Tides. |
| 7/1/12 |
Philadelphia Phillies traded DH Jim Thome to Baltimore Orioles for C Gabriel Lino and RHP Kyle Simon. |
| 7/1/12 |
Baltimore Orioles recalled RHP Miguel Gonzalez from Norfolk Tides. |
| 7/2/12 |
Baltimore Orioles optioned Brian Matusz to Norfolk Tides. |
| 7/2/12 |
Baltimore Orioles recalled Steve Johnson from Norfolk Tides. |
| 7/3/12 |
Baltimore Orioles placed 2B Brian Roberts on the 15-day disabled list retroactive to July 2, 2012. Groin strain. |
| 7/3/12 |
Baltimore Orioles signed RHP Jake Pintar. |
| 7/3/12 |
Baltimore Orioles recalled Xavier Avery from Norfolk Tides. |
| 7/4/12 |
Chris Tillman roster status changed by Baltimore Orioles. |
| 7/4/12 |
Baltimore Orioles optioned Steve Johnson to Norfolk Tides. |
| 7/4/12 |
Baltimore Orioles recalled Chris Tillman from Norfolk Tides. |
| 7/5/12 |
Baltimore Orioles optioned Chris Tillman to Bowie Baysox. |
| 7/5/12 |
Baltimore Orioles sent Zach Phillips outright to Norfolk Tides. |
| 7/5/12 |
Baltimore Orioles signed IF Christian Walker. |
| 7/5/12 |
Baltimore Orioles recalled Joe Mahoney from Norfolk Tides. |
| 7/6/12 |
Baltimore Orioles optioned Jake Arrieta to Norfolk Tides. |
| 7/7/12 |
Baltimore Orioles recalled Steve Tolleson from Norfolk Tides. |
| 7/9/12 |
Baltimore Orioles activated RF Nick Markakis from the 15-day disabled list. |
| 7/9/12 |
Baltimore Orioles optioned Joe Mahoney to Norfolk Tides. |
| 7/9/12 |
Baltimore Orioles signed RHP Branden Kline. |
| 7/10/12 |
Baltimore Orioles signed RHP Matt Price. |
| 7/11/12 |
Baltimore Orioles signed OF Derrick Bleeker. |
| 7/12/12 |
Baltimore Orioles optioned CF Xavier Avery to Norfolk Tides. |
| 7/13/12 |
Baltimore Orioles activated LF Endy Chavez from the 15-day disabled list. |
| 7/13/12 |
Baltimore Orioles signed OF Raymond Hunnicutt. |
| 7/13/12 |
Baltimore Orioles signed RHP Kevin Gausman. |
| 7/14/12 |
Baltimore Orioles activated C Taylor Teagarden from the 60-day disabled list. |
| 7/14/12 |
Baltimore Orioles designated Dana Eveland for assignment. |
| 7/14/12 |
Baltimore Orioles sent C Ronny Paulino outright to Norfolk Tides. |
| 7/14/12 |
Baltimore Orioles selected the contract of Miguel Socolovich from Norfolk Tides. |
| 7/15/12 |
Baltimore Orioles placed RHP Jason Hammel on the 15-day disabled list retroactive to July 14, 2012. Right knee injury. |
| 7/15/12 |
Baltimore Orioles recalled Steve Johnson from Norfolk Tides. |
| 7/16/12 |
Baltimore Orioles optioned Steve Johnson to Norfolk Tides. |
| 7/16/12 |
Baltimore Orioles sent Dana Eveland outright to Norfolk Tides. |
| 7/16/12 |
Baltimore Orioles recalled RHP Chris Tillman from Bowie Baysox. |
| 7/17/12 |
Baltimore Orioles transferred 1B Nick Johnson from the 15-day disabled list to the 60-day disabled list. |
| 7/17/12 |
Baltimore Orioles placed 2B Robert Andino on the 15-day disabled list retroactive to July 16, 2012. Left shoulder subluxation. |
| 7/17/12 |
Baltimore Orioles optioned Miguel Socolovich to Norfolk Tides. |
| 7/17/12 |
Baltimore Orioles signed free agent RHP Jesse Fernandez to a minor league contract. |
| 7/17/12 |
Baltimore Orioles selected the contract of RHP Brad Bergesen from Norfolk Tides. |
| 7/17/12 |
Baltimore Orioles recalled Zach Britton from Norfolk Tides. |
| 7/18/12 |
Baltimore Orioles designated Brad Bergesen for assignment. |
| 7/18/12 |
Baltimore Orioles signed free agent RHP Joseph Yermal to a minor league contract. |
| 7/18/12 |
Baltimore Orioles recalled Tommy Hunter from Norfolk Tides. |
| 7/20/12 |
New York Mets traded SS Omar Quintanilla to Baltimore Orioles for cash. |
| 7/20/12 |
Arizona Diamondbacks claimed RHP Brad Bergesen off waivers from Baltimore Orioles. |
| 7/21/12 |
Baltimore Orioles designated Steve Pearce for assignment. |
| 7/23/12 |
CF Raymond Hunnicutt assigned to GCL Orioles from Baltimore Orioles. |
| 7/24/12 |
Baltimore Orioles signed free agent OF Henry Urrutia to a minor league contract. |
| 7/26/12 |
Baltimore Orioles optioned 3B Steve Tolleson to Norfolk Tides. |
| 7/26/12 |
Baltimore Orioles selected the contract of LHP Dana Eveland from Norfolk Tides. |
| 7/27/12 |
Baltimore Orioles designated Dana Eveland for assignment. |
| 7/27/12 |
Baltimore Orioles recalled Miguel Socolovich from Norfolk Tides. |
| 7/28/12 |
Houston Astros claimed 1B Steve Pearce off waivers from Baltimore Orioles. |
| 7/29/12 |
Baltimore Orioles optioned Miguel Socolovich to Norfolk Tides. |
| 7/29/12 |
Baltimore Orioles sent LHP Dana Eveland outright to Norfolk Tides. |
| 7/29/12 |
Baltimore Orioles selected the contract of Lew Ford from Norfolk Tides. |
| 7/31/12 |
Baltimore Orioles placed DH Jim Thome on the 15-day disabled list retroactive to July 29, 2012. Back Spasms |
| 7/31/12 |
Robert Andino roster status changed by Baltimore Orioles. |
