Hanrahan, 32, is coming off of a 2013 campaign that was shortened due to having Tommy John surgery. He was throwing as hard as 93 MPH in a showcase that he held for teams just a few weeks ago, which prompted many teams to show interest in signing him.
In the three years before his surgery, from 2010 to 2012, Joel Hanrahan was a fantastic for the Pirates. During that time, he went 10-7 with a 2.73 ERA and a 1.172 WHIP over 205 games, in which he pitched 198 innings (141 ERA+). From 2011 to 2012, Hanrahan averaged 38 saves a seasons. The Tigers were smart to take a chance on Hanrahan, especially since he was brilliant prior to having needed his surgery.
The Tigers bullpen has been one of the worst in the Major Leagues, posting the second-worst bullpen ERA, fourth-worst batting average against, and have allowed the third-worst OPS. In order to be a contender this season, the Tigers needed to improve their bullpen and taking a chance on Hanrahan definitely serves that purpose. He could be really key down the stretch.