14. Joel Hanrahan

By Chad Finn, Boston.com Columnist

The new closer had a sensational season in 2011 for the Pirates (1.83 ERA, 40 saves, 1.049 WHIP) and followed up with a very good season last year (36 saves, 2.72 ERA) that was marred by a brutal September. His spike in walks (36) and homers (eight allowed in 59.2 innings) is cause for some concern, but he says he’s fixed a mechanical flaw and should be as effective as ever in the ninth inning.