| SP | Bauer, T.Bauer, Trevor >> | 27 | 2018 | R | 93 | 21 | 21 | 7 | 4 | 4.31 | .338 | 1.48 | 9.7 | 3.7 | 9.8 | 123.1 | 132 | 63 | 59 | 6 | 50 | 134 | 0 | 0 | 0 | 0 | 13 | 7 | 7 | 2.85 |
| SP | Flaherty, J.Flaherty, Jack >> | 22 | 2018 | R | 93 | 25 | 4 | 8 | 6 | 3.61 | .309 | 1.33 | 7.1 | 4.9 | 11.5 | 57.1 | 45 | 23 | 23 | 5 | 31 | 73 | 0 | 2 | 0 | 0 | 2 | 1 | 1 | 3.26 |
| SP | Kluber, C.Kluber, Corey † >> | 32 | 2018 | R | 91 | 20 | 20 | 11 | 5 | 2.85 | .300 | 1.22 | 8.6 | 2.4 | 9.6 | 139.0 | 133 | 46 | 44 | 7 | 37 | 148 | 3 | 0 | 0 | 1 | 14 | 9 | 2 | 2.52 |
| SP | Jackson, E.Jackson, Edwin >> | 35 | 2018 | R | 67 | 19 | 19 | 4 | 4 | 5.60 | .363 | 1.65 | 9.3 | 5.6 | 7.4 | 91.2 | 94 | 58 | 57 | 8 | 57 | 75 | 0 | 0 | 0 | 0 | 3 | 6 | 8 | 4.57 |
| RP | Chapman, A.Chapman, Aroldis >> | 30 | 2018 | L | 92 | 42 | 0 | 2 | 0 | 2.87 | .332 | 1.40 | 6.7 | 5.9 | 10.9 | 47.0 | 35 | 15 | 15 | 4 | 31 | 57 | 0 | 6 | 2 | 0 | 0 | 4 | 3 | 3.91 |
| RP | Trivino, L.Trivino, Lou >> | 26 | 2018 | R | 72 | 44 | 0 | 3 | 0 | 2.47 | .278 | 1.16 | 6.5 | 3.9 | 9.9 | 51.0 | 37 | 14 | 14 | 4 | 22 | 56 | 0 | 6 | 1 | 0 | 0 | 0 | 1 | 3.12 |
| RP | Harris, W.Harris, Will >> | 33 | 2018 | R | 66 | 1 | 0 | 1 | 0 | 0.00 | .250 | 1.00 | 4.5 | 4.5 | 9.0 | 2.0 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.50 |
| RP | Alvarez, J.Alvarez, Jose >> | 29 | 2018 | L | 62 | 3 | 0 | 0 | 0 | 0.00 | .214 | 0.82 | 6.0 | 3.0 | 9.0 | 3.2 | 2 | 0 | 0 | 0 | 1 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2.00 |