Red Sox Roster & Staff
Transactions
| Date | Transaction |
| 05/31/12 | Boston Red Sox signed free agent SS Luis Valenzuela to a minor league contract. |
| 05/31/12 | Boston Red Sox signed free agent RHP Wildyn Florian to a minor league contract. |
| 05/28/12 | Boston Red Sox activated RF Ryan Sweeney from the 7-day disabled list. |
| 05/28/12 | Boston Red Sox optioned Che-Hsuan Lin to Pawtucket Red Sox. |
| 05/22/12 | Boston Red Sox placed OF Cody Ross on the 15-day disabled list retroactive to May 19, 2012. Fracture of the navicular bone in left foot |
| 05/22/12 | Boston Red Sox selected the contract of CF Scott Podsednik from Pawtucket Red Sox. |
| 05/22/12 | Boston Red Sox placed RF Ryan Sweeney on the 7-day disabled list retroactive to May 20, 2012. Concussion. |
| 05/22/12 | Boston Red Sox transferred RHP Daisuke Matsuzaka from the 15-day disabled list to the 60-day disabled list. |
| 05/22/12 | Kevin Youkilis roster status changed by Boston Red Sox. |
| 05/20/12 | Boston Red Sox optioned Mauro Gomez to Pawtucket Red Sox. |
| 05/20/12 | Boston Red Sox recalled Che-Hsuan Lin from Pawtucket Red Sox. |
| 05/13/12 | Darnell McDonald roster status changed by Boston Red Sox. |
| 05/13/12 | Boston Red Sox transferred CF Jacoby Ellsbury from the 15-day disabled list to the 60-day disabled list. |
| 05/13/12 | Boston Red Sox selected the contract of Mauro Gomez from Pawtucket Red Sox. |
| 05/12/12 | New York Yankees claimed LHP Justin Thomas off waivers from Boston Red Sox. |
| 05/12/12 | Philadelphia Phillies traded CF Scott Podsednik to Boston Red Sox for cash. |
| 05/12/12 | Boston Red Sox traded 1B Jeff Larish to Pittsburgh Pirates. |
| 05/12/12 | Philadelphia Phillies traded CF Scott Podsednik to Boston Red Sox for cash. |
| 05/10/12 | Boston Red Sox optioned Clayton Mortensen to Pawtucket Red Sox. |
| 05/10/12 | Boston Red Sox designated Justin Thomas for assignment. |
| 05/10/12 | Boston Red Sox selected the contract of LF Daniel Nava from Pawtucket Red Sox. |
| 05/10/12 | Boston Red Sox optioned Clayton Mortensen to Pawtucket Red Sox. |
| 05/06/12 | Boston Red Sox placed RHP Aaron Cook on the 15-day disabled list. Left knee laceration. |
| 05/06/12 | Boston Red Sox activated LHP Andrew Miller from the 15-day disabled list. |
| 05/06/12 | Andrew Miller roster status changed by Boston Red Sox. |
| 05/04/12 | Boston Red Sox selected the contract of RHP Aaron Cook from Pawtucket Red Sox. |
| 05/03/12 | Boston Red Sox optioned SS Jose Iglesias to Pawtucket Red Sox. |
| 05/03/12 | Boston Red Sox transferred LF Carl Crawford from the 15-day disabled list to the 60-day disabled list. |
| 05/02/12 | Boston Red Sox signed free agent RHP Mark Prior to a minor league contract. |
| 05/02/12 | Boston Red Sox optioned LF Lars Anderson to Pawtucket Red Sox. |
| 05/02/12 | Boston Red Sox placed 3B Kevin Youkilis on the 15-day disabled list retroactive to April 29, 2012. lower back strain |
| 05/02/12 | Boston Red Sox recalled 3B Will Middlebrooks from Pawtucket Red Sox. |
| 05/02/12 | Boston Red Sox recalled Clayton Mortensen from Pawtucket Red Sox. |
| 05/01/12 | Kevin Youkilis roster status changed by Boston Red Sox. |
| 05/01/12 | Boston Red Sox recalled Jose Iglesias from Pawtucket Red Sox. |
| 05/01/12 | Boston Red Sox optioned Junichi Tazawa to Pawtucket Red Sox. |