Joel Hanrahan has agreed to a one-year deal with the Detroit Tigers, who are hopeful the right-hander can bolster a shaky bullpen when he finally returns from elbow surgery.
Hanrahan had Tommy John surgery last May after nine appearances for the Boston Red Sox in 2013. He saved 76 games over the previous two seasons with the Pittsburgh Pirates.
The Tigers are putting Hanrahan on the 15-day disabled list, saying they will not rush him back to the majors. Hanrahan is expected to throw to hitters next week.
Detroit signed veteran Joe Nathan to be the closer in the offseason, but the bullpen was hurt by a season-ending injury to Bruce Rondon. Tigers relievers have a 5.37 ERA entering Friday night's game at Kansas City.