| SP | Buehler, W.Buehler, Walker † >> | 23 | 2018 | R | 97 | 21 | 21 | 10 | 6 | 3.20 | .287 | 1.17 | 8.0 | 2.5 | 10.6 | 132.1 | 118 | 49 | 47 | 11 | 37 | 155 | 0 | 0 | 0 | 0 | 14 | 5 | 3 | 2.69 |
| SP | Rodriguez, D.Rodriguez, Dereck >> | 26 | 2018 | R | 76 | 20 | 20 | 7 | 8 | 5.08 | .353 | 1.59 | 10.5 | 3.9 | 6.2 | 111.2 | 130 | 66 | 63 | 16 | 48 | 77 | 0 | 0 | 0 | 0 | 5 | 5 | 1 | 4.92 |
| SP | Rodon, C.Rodon, Carlos # >> | 25 | 2018 | L | 64 | 19 | 19 | 7 | 2 | 2.80 | .267 | 1.07 | 6.5 | 3.2 | 7.0 | 131.2 | 95 | 41 | 41 | 19 | 46 | 102 | 2 | 0 | 0 | 2 | 13 | 3 | 1 | 4.45 |
| SP | Musgrove, J.Musgrove, Joseph >> | 25 | 2018 | R | 55 | 19 | 19 | 3 | 9 | 4.89 | .325 | 1.42 | 10.2 | 2.6 | 7.5 | 119.2 | 135 | 68 | 65 | 21 | 35 | 99 | 1 | 0 | 0 | 0 | 7 | 3 | 8 | 4.59 |
| RP | Treinen, B.Treinen, Blake >> | 30 | 2018 | R | 98 | 51 | 0 | 6 | 2 | 2.30 | .244 | 0.96 | 5.5 | 3.1 | 9.9 | 78.1 | 48 | 20 | 20 | 5 | 27 | 86 | 0 | 1 | 4 | 0 | 0 | 1 | 3 | 2.71 |
| RP | Iglesias, R.Iglesias, Raisel >> | 28 | 2018 | R | 79 | 54 | 0 | 3 | 2 | 3.90 | .345 | 1.55 | 9.3 | 4.8 | 10.1 | 64.2 | 66 | 28 | 28 | 7 | 34 | 72 | 0 | 6 | 2 | 0 | 0 | 2 | 0 | 3.86 |
| RP | Casilla, S.Casilla, Santiago † >> | 38 | 2018 | R | 63 | 48 | 0 | 7 | 1 | 3.49 | .344 | 1.48 | 7.4 | 6.1 | 7.6 | 56.2 | 46 | 23 | 22 | 5 | 38 | 47 | 0 | 8 | 2 | 0 | 0 | 5 | 6 | 4.79 |
| RP | Buchter, R.Buchter, Ryan >> | 31 | 2018 | L | 56 | 37 | 0 | 1 | 3 | 4.46 | .320 | 1.38 | 9.9 | 2.6 | 11.1 | 38.1 | 42 | 19 | 19 | 5 | 11 | 47 | 0 | 4 | 4 | 0 | 0 | 1 | 2 | 3.18 |
| RP | Tepera, R.Tepera, Ryan >> | 30 | 2018 | R | 49 | 28 | 0 | 3 | 2 | 7.42 | .364 | 1.62 | 11.7 | 3.0 | 10.8 | 30.1 | 39 | 28 | 25 | 7 | 10 | 36 | 0 | 1 | 1 | 0 | 0 | 3 | 1 | 4.93 |