| SP | Corbin, P.Corbin, Patrick >> | 28 | 2018 | L | 91 | 33 | 33 | 13 | 10 | 4.39 | .317 | 1.38 | 9.8 | 2.6 | 10.8 | 197.0 | 215 | 100 | 96 | 25 | 57 | 236 | 0 | 0 | 0 | 0 | 0 | 2 | 11 | 3.15 |
| SP | Buchholz, C.Buchholz, Clay >> | 34 | 2018 | R | 85 | 24 | 24 | 9 | 8 | 3.05 | .268 | 1.09 | 7.7 | 2.2 | 7.9 | 162.1 | 138 | 57 | 55 | 15 | 39 | 143 | 1 | 0 | 0 | 0 | 0 | 1 | 4 | 3.18 |
| SP | Greinke, Z.Greinke, Zack >> | 35 | 2018 | R | 81 | 32 | 32 | 17 | 6 | 2.96 | .260 | 1.04 | 7.0 | 2.4 | 8.4 | 218.2 | 169 | 79 | 72 | 29 | 58 | 204 | 1 | 0 | 0 | 0 | 0 | 3 | 2 | 3.70 |
| RP | Bracho, S.Bracho, Silvino >> | 25 | 2018 | R | 70 | 103 | 0 | 5 | 5 | 3.61 | .273 | 1.12 | 7.4 | 2.7 | 10.2 | 89.2 | 73 | 38 | 36 | 10 | 27 | 101 | 0 | 3 | 5 | 0 | 0 | 1 | 3 | 3.13 |
| RP | McFarland, T.McFarland, T.J. >> | 29 | 2018 | L | 55 | 101 | 0 | 6 | 4 | 3.32 | .269 | 1.08 | 6.6 | 3.1 | 6.9 | 95.0 | 70 | 35 | 35 | 10 | 33 | 73 | 0 | 4 | 3 | 0 | 0 | 2 | 1 | 3.94 |
| RP | Chafin, A.Chafin, Andrew >> | 28 | 2018 | L | 54 | 72 | 0 | 5 | 1 | 2.05 | .255 | 0.99 | 5.5 | 3.5 | 10.8 | 61.1 | 37 | 15 | 14 | 5 | 24 | 73 | 0 | 0 | 2 | 0 | 0 | 2 | 3 | 2.95 |
| RP | Boxberger, B.Boxberger, Brad >> | 30 | 2018 | R | 53 | 86 | 0 | 5 | 0 | 2.46 | .243 | 0.96 | 5.4 | 3.3 | 12.9 | 84.0 | 50 | 23 | 23 | 9 | 31 | 120 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 2.64 |
| SP | Godley, Z.Godley, Zack >> | 28 | 2018 | R | 34 | 26 | 9 | 6 | 2 | 4.51 | .325 | 1.42 | 7.9 | 4.9 | 11.1 | 101.2 | 89 | 51 | 51 | 15 | 55 | 125 | 0 | 0 | 0 | 0 | 0 | 3 | 7 | 4.18 |
| SU | Bradley, A.Bradley, Archie >> | 25 | 2018 | R | 67 | 67 | 0 | 3 | 3 | 3.39 | .256 | 1.02 | 6.5 | 2.8 | 10.8 | 71.2 | 51 | 27 | 27 | 8 | 22 | 85 | 0 | 6 | 5 | 0 | 0 | 1 | 1 | 3.04 |
| CL | Hirano, Y.Hirano, Yoshihisa >> | 34 | 2018 | R | 75 | 70 | 0 | 6 | 7 | 1.85 | .237 | 0.92 | 5.3 | 3.0 | 9.1 | 73.0 | 43 | 18 | 15 | 6 | 24 | 74 | 0 | 40 | 4 | 0 | 0 | 1 | 4 | 3.07 |