| SP | Buehler, W.Buehler, Walker † >> | 23 | 2018 | R | 97 | 28 | 28 | 11 | 9 | 3.54 | .303 | 1.28 | 8.5 | 3.1 | 9.4 | 175.1 | 165 | 69 | 69 | 22 | 60 | 182 | 0 | 0 | 0 | 0 | 16 | 4 | 3 | 3.65 |
| SP | Wheeler, Z.Wheeler, Zack >> | 28 | 2018 | R | 85 | 26 | 26 | 5 | 11 | 5.83 | .332 | 1.45 | 9.8 | 3.2 | 9.2 | 156.0 | 170 | 106 | 101 | 27 | 56 | 159 | 1 | 0 | 0 | 1 | 10 | 7 | 1 | 4.42 |
| SP | Berrios, J.Berrios, Jose >> | 24 | 2018 | R | 82 | 26 | 26 | 9 | 6 | 4.74 | .340 | 1.51 | 9.5 | 4.1 | 9.0 | 153.2 | 162 | 85 | 81 | 24 | 70 | 153 | 1 | 0 | 0 | 0 | 11 | 5 | 1 | 4.51 |
| SP | Manaea, S.Manaea, Sean >> | 26 | 2018 | L | 77 | 27 | 26 | 9 | 11 | 4.92 | .292 | 1.21 | 8.5 | 2.4 | 6.8 | 159.0 | 151 | 88 | 87 | 27 | 42 | 121 | 1 | 0 | 0 | 1 | 14 | 4 | 6 | 4.55 |
| RP | Kimbrel, C.Kimbrel, Craig >> | 30 | 2018 | R | 94 | 69 | 0 | 5 | 3 | 3.15 | .305 | 1.23 | 5.6 | 5.4 | 12.6 | 91.1 | 57 | 32 | 32 | 9 | 55 | 127 | 0 | 0 | 3 | 0 | 0 | 8 | 6 | 3.57 |
| RP | Rogers, T.Rogers, Taylor >> | 27 | 2018 | L | 90 | 75 | 0 | 6 | 2 | 2.93 | .291 | 1.19 | 7.6 | 3.1 | 12.0 | 98.1 | 83 | 34 | 32 | 7 | 34 | 131 | 0 | 8 | 5 | 0 | 0 | 4 | 0 | 2.42 |
| RP | Stammen, C.Stammen, Craig >> | 34 | 2018 | R | 74 | 56 | 0 | 2 | 4 | 3.70 | .286 | 1.14 | 7.9 | 2.5 | 11.8 | 65.2 | 57 | 27 | 27 | 7 | 18 | 85 | 0 | 11 | 3 | 0 | 0 | 4 | 0 | 2.80 |