Saltalmacchia was a player that had been linked to the Red Sox in the past, but nothing had ever come to fruition until now. He will report to Triple-A Pawtucket.
In exchange for Saltalamachhia, the Red Sox parted with two Minor League players -- right-hander Roman Mendez and first baseman Chris McGuiness. Boston also sent a player to be named and cash considerations to Texas.
Victor Martinez, who returned from the disabled list last week, is Boston's starting catcher. Backup Jason Varitek has been out since June 30 with a fractured right foot and will remain out for at least a couple of more weeks. Kevin Cash is serving as Martinez's backup.
Saltalamacchia started for the Rangers on Opening Day, but went to the disabled list following the second game of the season with stiffness in his upper back and shoulder.
However, Saltalamacchia did not return to the Rangers after getting healthy. Instead, he played 63 games for Triple-A Oklahoma City before the trade, hitting .244 with 11 homers and 33 RBIs.
Over the years, he has been better regarded for his work at the plate than behind it. Starting in June of last season, Saltalamacchia started having problems with erratic throws, even back to the mound.
During his stay in the Minors this year, he worked on timing mechanisms that helped him correct the problem.
The 25-year-old Saltalamacchia has played 240 games in the Majors, hitting .251 with 23 homers and 94 RBIs. He can also play first base.
Ian Browne is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.