| SP | Corbin, P.Corbin, Patrick >> | 28 | 2018 | L | 91 | 11 | 7 | 3.15 | .256 | .00 | 1.05 | 7.3 | 2.2 | 11.1 | 200 | 162 | 15 | 48 | 246 | 1 | 0 | 8 | 107 | 21 | C |
| SP | Godley, Z.Godley, Zack >> | 28 | 2018 | R | 36 | 15 | 11 | 4.74 | .322 | .00 | 1.45 | 8.9 | 4.1 | 9.4 | 178 | 177 | 16 | 81 | 185 | 0 | 0 | 17 | 96 | 19 | C |
| SP | Koch, M.Koch, Matt >> | 27 | 2018 | R | 43 | 5 | 5 | 4.15 | .291 | .00 | 1.28 | 9.2 | 2.3 | 5.2 | 86 | 88 | 19 | 22 | 50 | 0 | 0 | 3 | 81 | 15 | C |
| RP | Chafin, A.Chafin, Andrew >> | 28 | 2018 | L | 58 | 1 | 6 | 3.10 | .296 | .00 | 1.35 | 7.5 | 4.6 | 9.7 | 49 | 41 | 0 | 25 | 53 | 0 | 0 | 3 | 23 | 20 | C |
| SP | Walker, T.Walker, Taijuan >> | 25 | 2018 | R | 11 | 0 | 0 | 3.46 | .290 | .00 | 1.54 | 10.4 | 3.5 | 6.2 | 13 | 15 | 1 | 5 | 9 | 0 | 0 | 0 | 78 | 19 | C |
| RP | Andriese, M.Andriese, Matt >> | 28 | 2018 | R | 37 | 3 | 7 | 5.26 | .309 | .00 | 1.40 | 9.7 | 2.9 | 9.0 | 78 | 84 | 15 | 25 | 78 | 0 | 0 | 3 | 36 | 19 | C |
| SP | Ray, R.Ray, Robbie >> | 26 | 2018 | L | 64 | 6 | 2 | 3.93 | .306 | .00 | 1.36 | 7.1 | 5.1 | 12.1 | 123 | 97 | 19 | 70 | 165 | 0 | 0 | 5 | 91 | 22 | C |
| SP | Greinke, Z.Greinke, Zack >> | 35 | 2018 | R | 82 | 15 | 11 | 3.21 | .262 | .00 | 1.08 | 7.9 | 1.9 | 8.7 | 207 | 181 | 28 | 43 | 199 | 0 | 0 | 4 | 111 | 18 | C |
| RP | Bracho, S.Bracho, Silvino >> | 25 | 2018 | R | 74 | 2 | 0 | 3.19 | .264 | .00 | 1.19 | 7.3 | 3.5 | 9.9 | 31 | 25 | 2 | 12 | 34 | 0 | 0 | 2 | 23 | 21 | C |
| RP | Miller, S.Miller, Shelby >> | 27 | 2018 | R | 12 | 0 | 4 | 10.69 | .356 | .00 | 2.00 | 13.5 | 4.5 | 10.7 | 16 | 24 | 5 | 8 | 19 | 0 | 0 | 1 | 58 | 29 | C |
| RP | Bradley, A.Bradley, Archie >> | 25 | 2018 | R | 70 | 4 | 5 | 3.64 | .269 | .00 | 1.15 | 7.9 | 2.5 | 9.5 | 71 | 62 | 9 | 20 | 75 | 0 | 3 | 2 | 23 | 20 | C |
| RP | Sherfy, J.Sherfy, Jimmie >> | 26 | 2018 | R | 85 | 0 | 0 | 1.65 | .237 | .00 | 1.13 | 4.5 | 5.6 | 9.6 | 16 | 8 | 1 | 10 | 17 | 0 | 0 | 0 | 23 | 27 | C |
| SP | Buchholz, C.Buchholz, Clay >> | 34 | 2018 | R | 86 | 7 | 2 | 2.01 | .251 | .00 | 1.04 | 7.3 | 2.0 | 7.4 | 98 | 80 | 9 | 22 | 81 | 1 | 0 | 1 | 108 | 18 | C |
| RP | Ziegler, B.Ziegler, Brad >> | 39 | 2018 | R | 44 | 2 | 6 | 3.91 | .295 | .00 | 1.32 | 8.8 | 3.1 | 6.2 | 73 | 71 | 8 | 25 | 50 | 0 | 10 | 1 | 23 | 16 | C |
| RP | Boxberger, B.Boxberger, Brad >> | 30 | 2018 | R | 57 | 3 | 7 | 4.39 | .310 | .00 | 1.43 | 7.5 | 5.4 | 12.1 | 53 | 44 | 9 | 32 | 71 | 0 | 32 | 3 | 23 | 24 | C |
| RP | Salas, F.Salas, Fernando >> | 33 | 2018 | R | 43 | 4 | 4 | 4.50 | .290 | .00 | 1.33 | 9.0 | 2.9 | 6.8 | 40 | 40 | 5 | 13 | 30 | 0 | 0 | 2 | 23 | 17 | C |
| RP | Delgado, R.Delgado, Randall >> | 28 | 2018 | R | 26 | 2 | 0 | 4.76 | .283 | .00 | 1.55 | 9.0 | 4.9 | 4.1 | 11 | 11 | 3 | 6 | 5 | 0 | 0 | 2 | 23 | 15 | C |
| RP | Diekman, J.Diekman, Jake >> | 31 | 2018 | L | 44 | 1 | 2 | 4.73 | .321 | .00 | 1.51 | 8.3 | 5.3 | 11.2 | 53 | 49 | 4 | 31 | 66 | 0 | 2 | 3 | 23 | 23 | C |
| RP | Hirano, Y.Hirano, Yoshihisa >> | 34 | 2018 | R | 79 | 4 | 3 | 2.44 | .257 | .00 | 1.09 | 6.7 | 3.1 | 8.0 | 66 | 49 | 6 | 23 | 59 | 0 | 3 | 6 | 23 | 18 | C |
| RP | McFarland, T.McFarland, T.J. >> | 29 | 2018 | L | 59 | 2 | 2 | 2.00 | .276 | .00 | 1.19 | 8.0 | 2.8 | 5.3 | 72 | 64 | 4 | 22 | 42 | 0 | 1 | 2 | 30 | 15 | C |