The Boston Red Sox put right-handed reliever Justin Slaten on the 15-day injured list due to shoulder inflammation.
It was one of several roster moves the Red Sox made Sunday morning, which included replacing Slaten on the roster with right-hander Luis Guerrero, who was called up from Triple-A Worcester.
The Red Sox also selected the contract of utility player Nate Eaton and optioned infielder Nick Sogard to Triple-A, designating catcher Blake Sabol for assignment to clear roster space.
Slaten, 27, has been a key piece of Boston's relief staff this spring, despite his 1-4 record.