| SP | Flaherty, J.Flaherty, Jack | 37 | Giants | R | 85 | 26 | 26 | 13 | 5 | 3.11 | .275 | 1.12 | 7.3 | 2.7 | 9.2 | 165.0 | 134 | 59 | 57 | 17 | 50 | 169 | 2 | 0 | 0 | 2 | 18 | 4 | 5 | 3.27 |
| SP | Paddack, C.Paddack, Chris | 37 | Pirates | R | 92 | 26 | 26 | 15 | 7 | 3.51 | .289 | 1.22 | 7.8 | 3.1 | 9.2 | 156.1 | 136 | 64 | 61 | 15 | 54 | 160 | 0 | 0 | 0 | 0 | 15 | 1 | 0 | 3.26 |
| SP | Rogers, T.Rogers, Trevor # | 28 | Nationals | L | 97 | 27 | 25 | 15 | 5 | 3.58 | .271 | 1.09 | 7.3 | 2.5 | 7.3 | 173.1 | 141 | 73 | 69 | 25 | 48 | 140 | 10 | 0 | 0 | 2 | 15 | 4 | 3 | 4.16 |
| SP | Widener, T.Widener, Taylor | 27 | Padres | R | 95 | 26 | 26 | 14 | 7 | 3.61 | .281 | 1.14 | 7.8 | 2.5 | 7.6 | 204.1 | 176 | 87 | 82 | 23 | 57 | 172 | 7 | 0 | 0 | 0 | 15 | 7 | 7 | 3.72 |
| RP | Castellanos, H.Castellanos, Humberto | 30 | Diamondbacks | R | 95 | 67 | 0 | 6 | 2 | 2.62 | .262 | 1.06 | 6.8 | 2.7 | 7.6 | 137.1 | 104 | 48 | 40 | 11 | 41 | 115 | 0 | 8 | 1 | 0 | 0 | 1 | 2 | 3.28 |
| RP | Javier, C.Javier, Cristian | 33 | Padres | R | 94 | 64 | 0 | 9 | 8 | 2.48 | .297 | 1.24 | 7.3 | 3.8 | 10.6 | 109.0 | 89 | 34 | 30 | 8 | 46 | 128 | 0 | 12 | 5 | 0 | 0 | 3 | 6 | 2.95 |
| RP | Maiava, M.Maiava, Marcus + | 33 | Braves | L | 48 | 53 | 0 | 9 | 3 | 3.00 | .227 | 0.86 | 5.5 | 2.3 | 6.7 | 66.0 | 40 | 25 | 22 | 11 | 17 | 49 | 0 | 2 | 1 | 0 | 0 | 1 | 4 | 4.50 |