Chamberlain, 27, was once a promising prospect in the Yankees system, but Tommy John surgery in 2011 and a dislocated ankle in 2012 have limited him to 49 ⅓ innings in 49 appearances the last two seasons. For his career, Chamberlain is 21-13 with a 3.73 ERA in 215 games. He has struck out 408 batters in 402 ⅔ innings.
Chamberlain came to the majors as a 21-year old in 2007 and did a masterful job out of the bullpen. He started 12 of his 42 games in 2008 and recorded an ERA of 2.60. In 2009, he was a full time starter, going 9-6 with a 4.75 ERA. He was then moved back to the bullpen in 2010 and appeared in 73 games, recording a 4.40 ERA before being injured most of the last two seasons.