Hanrahan had his right elbow ligament replaced in May 2013 while with Boston, when he also had his right flexor tendon repaired. Detroit signed him to a one-year, $1 million contract in May, but he never appeared in a game. The Tigers agreed in November to a minor league contract for $18,000 a month with a provision for a $1 million deal if he made the 40-man roster.
"He's going to get the surgery, rehab and reconsider what's next on his agenda -- whether he's going to try and play again or not," Ausmus said.
Hanrahan is 22-18 with a 3.85 ERA and 100 saves in seven seasons with Washington, Pittsburgh and Boston.