| SP | Morton, C.Morton, Charlie † >> | 36 | 2019 | R | 92 | 37 | 37 | 17 | 12 | 3.10 | .282 | 1.12 | 7.2 | 2.9 | 10.6 | 221.0 | 176 | 77 | 76 | 21 | 72 | 260 | 0 | 0 | 0 | 0 | 25 | 12 | 3 | 3.02 |
| SP | Soroka, M.Soroka, Mike # >> | 21 | 2019 | R | 79 | 35 | 35 | 12 | 14 | 3.88 | .321 | 1.39 | 9.0 | 3.6 | 8.6 | 185.2 | 184 | 85 | 80 | 26 | 74 | 176 | 0 | 0 | 0 | 0 | 18 | 5 | 4 | 4.21 |
| SP | Greinke, Z.Greinke, Zack † >> | 36 | 2019 | R | 90 | 34 | 34 | 16 | 11 | 3.45 | .251 | 0.96 | 7.5 | 1.1 | 7.8 | 232.1 | 193 | 90 | 89 | 27 | 29 | 202 | 3 | 0 | 0 | 1 | 20 | 12 | 7 | 3.30 |
| RP | Castillo, D.Castillo, Diego >> | 25 | 2019 | R | 73 | 84 | 0 | 6 | 3 | 3.64 | .286 | 1.12 | 6.6 | 3.5 | 11.5 | 89.0 | 65 | 36 | 36 | 5 | 35 | 114 | 0 | 2 | 1 | 0 | 0 | 7 | 3 | 2.58 |
| RP | Newcomb, S.Newcomb, Sean # >> | 26 | 2019 | L | 59 | 56 | 0 | 2 | 1 | 4.46 | .354 | 1.62 | 10.4 | 4.3 | 9.7 | 38.1 | 44 | 20 | 19 | 6 | 18 | 41 | 0 | 2 | 1 | 0 | 0 | 1 | 2 | 4.39 |
| RP | Winkler, D.Winkler, Dan >> | 29 | 2019 | R | 58 | 68 | 0 | 3 | 0 | 2.56 | .257 | 0.99 | 4.7 | 4.3 | 9.2 | 59.2 | 31 | 17 | 17 | 3 | 28 | 60 | 0 | 1 | 0 | 0 | 0 | 3 | 1 | 3.20 |
| SU | Soria, J.Soria, Joakim >> | 35 | 2019 | R | 90 | 52 | 0 | 2 | 2 | 3.04 | .304 | 1.29 | 8.0 | 3.7 | 11.4 | 53.1 | 47 | 18 | 18 | 4 | 22 | 67 | 0 | 4 | 4 | 0 | 0 | 1 | 0 | 2.75 |