Capuano, 35, posted a 4.26 ERA with 6.9 K/9, 2.0 BB/9 and a 46.4 percent ground-ball rate (the best of his career in a full season) over 105 2/3 frames with the Dodgers in 2013. Though his ERA numbers have been up and down over the past four seasons, Sabermetric estimators such as xFIP and SIERA both feel that his skill-set has been that of a 3.60 to 3.97 ERA pitcher in that time.
The big factor with Capuano is health -- something he's struggled with throughout his career. Capuano has twice undergone Tommy John surgery, and while he looked to have overcome his injury woes when he threw 186 and 198 1/3 innings in 2011 and 2012, respectively, he was shelved by multiple injuries in 2013. Capuano saw time on the disabled list with a calf strain and a lat strain this past season, and he also threw just 4 2/3 innings in September as he battled a groin injury. He did throw three solid innings of relief and pick up a win in Game 3 of the NLDS, suggesting that he ultimately overcame that injury as well.
Capuano has posted excellent strikeout-to-walk ratios since returning from his second Tommy John surgery. From 2011-13, there are just 25 pitchers who have thrown 450 innings or more and posted a better K/BB ratio than Capuano's 3.14.