| SP | Wacha, M.Wacha, Michael # >> | 23 | 2015 | R | 80 | 10 | 10 | 4 | 4 | 5.15 | .329 | 1.46 | 9.8 | 3.5 | 6.9 | 57.2 | 62 | 35 | 33 | 8 | 22 | 44 | 0 | 0 | 0 | 0 | 5 | 1 | 0 | 4.49 |
| SP | Buchholz, C.Buchholz, Clay >> | 31 | 2015 | R | 71 | 10 | 10 | 3 | 3 | 3.21 | .289 | 1.20 | 9.1 | 1.7 | 7.3 | 67.1 | 68 | 25 | 24 | 5 | 13 | 54 | 0 | 0 | 0 | 0 | 6 | 1 | 2 | 2.99 |
| SP | Nelson, J.Nelson, Jimmy >> | 26 | 2015 | R | 67 | 9 | 9 | 4 | 3 | 3.31 | .315 | 1.33 | 7.5 | 4.5 | 7.8 | 54.1 | 45 | 20 | 20 | 4 | 27 | 47 | 0 | 0 | 0 | 0 | 5 | 3 | 4 | 3.89 |
| SP | Friedrich, C.Friedrich, Christian >> | 27 | 2015 | R | 8 | 7 | 6 | 0 | 2 | 9.35 | .409 | 2.08 | 16.9 | 3.4 | 7.9 | 8.2 | 15 | 9 | 9 | 2 | 3 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5.63 |
| CL | Benoit, J.Benoit, Joaquin >> | 38 | 2015 | R | 98 | 24 | 0 | 2 | 4 | 5.79 | .333 | 1.46 | 10.2 | 3.1 | 6.7 | 23.1 | 26 | 16 | 15 | 2 | 8 | 17 | 0 | 11 | 3 | 0 | 0 | 1 | 0 | 3.83 |
| RP | Blanton, J.Blanton, Joe >> | 35 | 2015 | R | 75 | 28 | 0 | 3 | 1 | 2.30 | .287 | 1.14 | 8.2 | 2.1 | 11.1 | 43.0 | 39 | 13 | 11 | 1 | 10 | 53 | 0 | 1 | 1 | 0 | 0 | 3 | 1 | 1.74 |
| RP | Roark, T.Roark, Tanner >> | 28 | 2015 | R | 34 | 16 | 0 | 1 | 0 | 2.70 | .307 | 1.29 | 10.6 | 1.2 | 7.8 | 23.1 | 27 | 7 | 7 | 3 | 3 | 20 | 0 | 2 | 2 | 0 | 0 | 1 | 0 | 3.48 |