| SP | Bauer, T.Bauer, Trevor >> | 27 | 2018 | R | 93 | 28 | 28 | 8 | 12 | 3.72 | .316 | 1.35 | 8.6 | 3.6 | 11.3 | 164.2 | 156 | 75 | 68 | 18 | 66 | 205 | 0 | 0 | 0 | 0 | 15 | 6 | 5 | 3.24 |
| SP | Kluber, C.Kluber, Corey † >> | 32 | 2018 | R | 91 | 27 | 27 | 13 | 8 | 3.23 | .295 | 1.24 | 8.8 | 2.4 | 10.0 | 184.0 | 179 | 81 | 66 | 20 | 49 | 204 | 1 | 0 | 0 | 0 | 20 | 3 | 3 | 3.04 |
| SP | Mikolas, M.Mikolas, Miles >> | 29 | 2018 | R | 73 | 26 | 26 | 4 | 10 | 5.32 | .328 | 1.41 | 10.2 | 2.5 | 7.5 | 155.2 | 176 | 98 | 92 | 24 | 43 | 129 | 0 | 0 | 0 | 0 | 12 | 9 | 3 | 4.35 |
| SP | Wacha, M.Wacha, Michael >> | 26 | 2018 | R | 70 | 26 | 26 | 9 | 7 | 5.24 | .350 | 1.59 | 8.6 | 5.7 | 7.9 | 132.1 | 126 | 79 | 77 | 17 | 84 | 116 | 0 | 0 | 0 | 0 | 7 | 4 | 3 | 4.92 |
| SP | Ryu, H.Ryu, Hyun-jin # >> | 31 | 2018 | L | 92 | 26 | 25 | 7 | 8 | 5.99 | .327 | 1.42 | 9.8 | 3.0 | 11.4 | 121.2 | 132 | 83 | 81 | 17 | 41 | 153 | 0 | 0 | 0 | 0 | 6 | 4 | 0 | 3.41 |
| RP | Chapman, A.Chapman, Aroldis >> | 30 | 2018 | L | 92 | 79 | 0 | 5 | 6 | 4.08 | .332 | 1.42 | 7.2 | 5.6 | 11.7 | 88.1 | 70 | 44 | 40 | 11 | 55 | 114 | 0 | 6 | 6 | 0 | 0 | 7 | 9 | 4.15 |
| RP | Iglesias, R.Iglesias, Raisel >> | 28 | 2018 | R | 79 | 63 | 0 | 5 | 1 | 2.80 | .300 | 1.23 | 6.9 | 4.1 | 9.6 | 74.0 | 57 | 26 | 23 | 8 | 34 | 79 | 0 | 4 | 3 | 0 | 0 | 4 | 1 | 3.81 |
| RP | Osuna, R.Osuna, Roberto >> | 23 | 2018 | R | 72 | 54 | 0 | 2 | 4 | 3.23 | .282 | 1.15 | 8.1 | 2.3 | 7.8 | 69.2 | 62 | 25 | 25 | 3 | 18 | 60 | 0 | 9 | 1 | 0 | 0 | 2 | 4 | 2.70 |
| RP | Morrow, B.Morrow, Brandon >> | 34 | 2018 | R | 69 | 52 | 0 | 8 | 3 | 4.34 | .303 | 1.30 | 8.8 | 2.9 | 10.9 | 56.0 | 55 | 32 | 27 | 12 | 18 | 68 | 0 | 1 | 4 | 0 | 0 | 0 | 1 | 4.32 |
| SP | Taillon, J.Taillon, Jameson >> | 26 | 2018 | R | 65 | 29 | 1 | 3 | 6 | 5.74 | .353 | 1.62 | 11.5 | 3.1 | 8.2 | 47.0 | 60 | 31 | 30 | 6 | 16 | 43 | 0 | 6 | 1 | 0 | 0 | 1 | 1 | 3.91 |