| SP | Alexander, P.Alexander, Pete $ >> | 28 | 1915 | R | 88 | 28 | 28 | 9 | 7 | 3.69 | .298 | 1.26 | 9.1 | 2.3 | 4.6 | 180.2 | 182 | 76 | 74 | 16 | 45 | 91 | 4 | 0 | 0 | 0 | 19 | 3 | 4 | 3.94 |
| SP | Nelson, R.Nelson, Roger # >> | 28 | 1972 | R | 85 | 28 | 28 | 4 | 5 | 5.75 | .323 | 1.42 | 9.6 | 3.2 | 4.9 | 114.1 | 121 | 73 | 73 | 18 | 41 | 62 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 5.10 |
| SP | Cueto, J.Cueto, Johnny # >> | 28 | 2014 | R | 75 | 27 | 27 | 10 | 9 | 5.41 | .346 | 1.58 | 10.3 | 4.0 | 5.6 | 143.0 | 163 | 89 | 86 | 21 | 63 | 89 | 0 | 0 | 0 | 0 | 12 | 1 | 3 | 5.01 |
| CL | Jansen, K.Jansen, Kenley >> | 28 | 2016 | R | 97 | 57 | 0 | 3 | 5 | 4.53 | .279 | 1.13 | 7.6 | 2.7 | 11.2 | 57.2 | 48 | 29 | 29 | 8 | 17 | 71 | 0 | 22 | 7 | 0 | 0 | 2 | 0 | 3.33 |
| RP | Hader, J.Hader, Josh † >> | 24 | 2018 | L | 92 | 85 | 0 | 8 | 2 | 3.12 | .276 | 1.13 | 6.7 | 3.5 | 9.9 | 89.1 | 66 | 34 | 31 | 10 | 35 | 98 | 0 | 1 | 4 | 0 | 0 | 1 | 0 | 3.47 |
| RP | Boxberger, B.Boxberger, Brad >> | 26 | 2014 | R | 83 | 53 | 0 | 7 | 5 | 2.91 | .283 | 1.18 | 7.8 | 2.9 | 10.5 | 65.0 | 56 | 21 | 21 | 9 | 21 | 76 | 0 | 3 | 2 | 0 | 0 | 0 | 4 | 3.43 |
| RP | Gallegos, G.Gallegos, Giovanny >> | 27 | 2019 | R | 82 | 57 | 0 | 4 | 3 | 3.36 | .277 | 1.15 | 6.9 | 3.5 | 8.0 | 61.2 | 47 | 23 | 23 | 11 | 24 | 54 | 0 | 2 | 2 | 0 | 0 | 0 | 2 | 4.75 |
| RP | Treinen, B.Treinen, Blake >> | 30 | 2018 | R | 80 | 55 | 0 | 7 | 3 | 4.07 | .317 | 1.37 | 8.1 | 4.4 | 8.8 | 59.2 | 53 | 27 | 27 | 7 | 29 | 58 | 0 | 2 | 3 | 0 | 0 | 1 | 2 | 4.10 |
| RP | Gregerson, L.Gregerson, Luke >> | 26 | 2010 | R | 73 | 58 | 0 | 4 | 2 | 3.14 | .276 | 1.12 | 7.6 | 2.5 | 7.4 | 71.2 | 60 | 33 | 25 | 8 | 20 | 58 | 0 | 1 | 2 | 0 | 0 | 2 | 0 | 3.76 |