| SP | Flaherty, J.Flaherty, Jack >> | 23 | 2019 | R | 91 | 32 | 32 | 14 | 8 | 4.31 | .317 | 1.36 | 8.8 | 3.5 | 10.3 | 194.1 | 189 | 96 | 93 | 30 | 76 | 221 | 0 | 0 | 0 | 0 | 15 | 5 | 2 | 3.98 |
| SP | Iwakuma, H.Iwakuma, Hisashi # >> | 32 | 2013 | R | 64 | 31 | 31 | 9 | 13 | 5.37 | .323 | 1.42 | 10.4 | 2.3 | 7.1 | 206.1 | 239 | 125 | 123 | 43 | 53 | 162 | 1 | 0 | 0 | 0 | 14 | 4 | 1 | 4.97 |
| SP | Gonzalez, G.Gonzalez, Gio >> | 27 | 2012 | L | 48 | 31 | 31 | 8 | 16 | 5.79 | .360 | 1.64 | 9.3 | 5.5 | 9.3 | 180.1 | 186 | 118 | 116 | 26 | 109 | 186 | 1 | 0 | 0 | 0 | 9 | 9 | 10 | 4.78 |
| RP | Sanchez, A.Sanchez, Aaron >> | 21 | 2014 | R | 91 | 82 | 0 | 7 | 2 | 3.27 | .297 | 1.23 | 7.2 | 3.9 | 8.0 | 123.2 | 99 | 45 | 45 | 18 | 53 | 110 | 0 | 8 | 4 | 0 | 0 | 5 | 5 | 4.53 |
| RP | McHugh, C.McHugh, Collin >> | 31 | 2018 | R | 64 | 67 | 0 | 5 | 3 | 2.68 | .273 | 1.10 | 6.3 | 3.5 | 10.1 | 94.0 | 66 | 29 | 28 | 8 | 37 | 106 | 0 | 7 | 2 | 0 | 0 | 3 | 0 | 3.13 |
| RP | Papelbon, J.Papelbon, Jonathan >> | 34 | 2014 | R | 48 | 56 | 0 | 4 | 2 | 4.42 | .319 | 1.36 | 8.8 | 3.4 | 6.7 | 59.0 | 58 | 30 | 29 | 11 | 22 | 44 | 0 | 8 | 3 | 0 | 0 | 3 | 0 | 5.20 |
| RP | Rodriguez, F.Rodriguez, Francisco >> | 32 | 2014 | R | 29 | 38 | 0 | 0 | 2 | 3.59 | .285 | 1.17 | 6.0 | 4.7 | 10.1 | 42.2 | 28 | 20 | 17 | 9 | 22 | 47 | 0 | 2 | 0 | 0 | 0 | 1 | 0 | 5.19 |
| RP | Watson, T.Watson, Tony >> | 29 | 2014 | L | 17 | 40 | 0 | 1 | 3 | 2.81 | .309 | 1.32 | 8.6 | 3.4 | 8.3 | 51.1 | 49 | 21 | 16 | 4 | 19 | 47 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 3.35 |
| SP | Marquez, G.Marquez, German >> | 23 | 2018 | R | 17 | 16 | 0 | 4 | 3 | 2.45 | .347 | 1.45 | 8.6 | 4.5 | 7.4 | 22.0 | 21 | 6 | 6 | 1 | 11 | 18 | 0 | 2 | 0 | 0 | 0 | 3 | 1 | 3.86 |