| SP | Tomlin, J.Tomlin, Josh >> | 30 | 2015 | R | 97 | 20 | 20 | 7 | 10 | 4.48 | .283 | 1.15 | 8.8 | 1.6 | 7.4 | 132.2 | 129 | 68 | 66 | 21 | 24 | 109 | 2 | 0 | 0 | 1 | 12 | 4 | 2 | 4.05 |
| SP | Iwakuma, H.Iwakuma, Hisashi >> | 34 | 2015 | R | 81 | 19 | 19 | 7 | 6 | 4.81 | .311 | 1.34 | 9.5 | 2.5 | 7.6 | 118.0 | 125 | 65 | 63 | 19 | 33 | 99 | 0 | 0 | 0 | 0 | 11 | 2 | 4 | 4.31 |
| SP | Santiago, H.Santiago, Hector >> | 27 | 2015 | L | 67 | 18 | 18 | 3 | 11 | 6.48 | .372 | 1.75 | 10.6 | 5.2 | 7.5 | 91.2 | 107 | 67 | 66 | 12 | 53 | 76 | 0 | 0 | 0 | 0 | 3 | 3 | 1 | 4.89 |
| CL | Harris, W.Harris, Will >> | 30 | 2015 | R | 96 | 37 | 0 | 2 | 5 | 2.97 | .288 | 1.18 | 7.3 | 3.5 | 7.8 | 36.1 | 29 | 12 | 12 | 2 | 14 | 31 | 0 | 13 | 3 | 0 | 0 | 1 | 2 | 3.25 |
| RP | Ziegler, B.Ziegler, Brad >> | 36 | 2015 | R | 82 | 55 | 0 | 4 | 2 | 2.74 | .255 | 1.01 | 5.8 | 3.3 | 7.5 | 62.1 | 40 | 23 | 19 | 4 | 23 | 52 | 0 | 3 | 2 | 0 | 0 | 1 | 2 | 3.32 |
| RP | Narveson, C.Narveson, Chris >> | 34 | 2015 | L | 71 | 63 | 0 | 2 | 2 | 3.18 | .259 | 1.03 | 7.3 | 1.9 | 10.0 | 65.0 | 53 | 23 | 23 | 11 | 14 | 72 | 0 | 3 | 4 | 0 | 0 | 1 | 0 | 3.68 |
| RP | Papelbon, J.Papelbon, Jonathan >> | 35 | 2015 | R | 67 | 46 | 0 | 2 | 3 | 2.96 | .308 | 1.32 | 9.2 | 2.8 | 6.6 | 48.2 | 49 | 19 | 16 | 4 | 15 | 35 | 0 | 2 | 3 | 0 | 0 | 1 | 0 | 3.63 |
| RP | Villanueva, C.Villanueva, Carlos >> | 32 | 2015 | R | 55 | 38 | 0 | 0 | 1 | 4.43 | .313 | 1.30 | 9.2 | 2.7 | 8.0 | 44.2 | 45 | 27 | 22 | 6 | 13 | 39 | 0 | 0 | 1 | 0 | 0 | 3 | 0 | 4.09 |
| SP | Bauer, T.Bauer, Trevor >> | 24 | 2015 | R | 58 | 2 | 0 | 0 | 0 | 0.00 | .444 | 2.40 | 9.0 | 27.0 | 9.0 | 1.2 | 1 | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.00 |
| SP | Ramirez, E.Ramirez, Erasmo >> | 25 | 2015 | R | 77 | 9 | 0 | 3 | 2 | 5.40 | .338 | 1.40 | 9.6 | 3.0 | 6.6 | 15.0 | 16 | 9 | 9 | 2 | 5 | 11 | 0 | 1 | 0 | 0 | 0 | 2 | 1 | 4.67 |