| SP | Johnson, R.Johnson, Randy WAS >> | 42 | 2005 | L | 74 | 36 | 36 | 11 | 14 | 4.71 | .337 | 1.49 | 10.3 | 3.1 | 7.3 | 216.0 | 247 | 115 | 113 | 28 | 75 | 175 | 5 | 0 | 0 | 1 | 18 | 7 | 3 | 4.20 |
| SP | Sanderson, S.Sanderson, Scott WAS # >> | 25 | 1981 | R | 73 | 34 | 34 | 14 | 12 | 4.81 | .314 | 1.33 | 9.3 | 2.7 | 6.3 | 187.0 | 193 | 104 | 100 | 17 | 56 | 130 | 2 | 0 | 0 | 1 | 17 | 8 | 3 | 3.82 |
| SP | Rogers, S.Rogers, Steve WAS # >> | 28 | 1977 | R | 65 | 34 | 34 | 8 | 15 | 5.36 | .339 | 1.52 | 11.0 | 2.8 | 7.1 | 179.2 | 218 | 111 | 107 | 32 | 55 | 141 | 1 | 0 | 0 | 0 | 16 | 4 | 2 | 4.74 |
| SP | Zimmermann, J.Zimmermann, Jordan WAS # >> | 25 | 2011 | R | 62 | 33 | 33 | 12 | 11 | 4.84 | .306 | 1.29 | 9.3 | 2.3 | 6.6 | 182.1 | 189 | 102 | 98 | 25 | 47 | 133 | 2 | 0 | 0 | 1 | 17 | 5 | 1 | 4.18 |
| CL | Treinen, B.Treinen, Blake WAS † >> | 30 | 2018 | R | 98 | 78 | 0 | 8 | 10 | 4.06 | .307 | 1.30 | 8.4 | 3.4 | 10.7 | 84.1 | 78 | 39 | 38 | 5 | 32 | 100 | 0 | 35 | 6 | 0 | 0 | 2 | 1 | 2.61 |
| RP | Hudson, D.Hudson, Daniel WAS >> | 37 | 2024 | R | 84 | 97 | 0 | 11 | 3 | 2.48 | .264 | 1.08 | 6.5 | 3.2 | 8.7 | 120.0 | 86 | 34 | 33 | 8 | 43 | 116 | 0 | 3 | 5 | 0 | 0 | 0 | 1 | 3.01 |
| RP | Marshall, M.Marshall, Mike WAS >> | 29 | 1972 | R | 75 | 75 | 0 | 3 | 2 | 2.39 | .257 | 1.00 | 5.9 | 3.2 | 8.1 | 116.2 | 76 | 34 | 31 | 9 | 41 | 105 | 0 | 2 | 1 | 0 | 0 | 4 | 0 | 3.36 |
| RP | Shaw, J.Shaw, Jeff WAS >> | 35 | 2001 | R | 66 | 81 | 0 | 6 | 0 | 2.89 | .281 | 1.16 | 8.6 | 1.9 | 8.2 | 81.0 | 77 | 27 | 26 | 6 | 17 | 74 | 0 | 3 | 3 | 0 | 0 | 1 | 0 | 2.80 |
| RP | Fryman, W.Fryman, Woodie WAS >> | 40 | 1980 | L | 67 | 95 | 0 | 1 | 0 | 2.65 | .307 | 1.32 | 8.1 | 3.8 | 7.6 | 71.1 | 64 | 23 | 21 | 7 | 30 | 60 | 0 | 1 | 1 | 0 | 0 | 1 | 2 | 3.90 |
| RP | Rauch, J.Rauch, Jon WAS >> | 28 | 2006 | R | 50 | 62 | 0 | 3 | 1 | 3.18 | .346 | 1.56 | 8.9 | 5.2 | 8.6 | 62.1 | 61 | 22 | 22 | 2 | 36 | 59 | 0 | 1 | 2 | 0 | 0 | 2 | 2 | 3.35 |
| SP | Colon, B.Colon, Bartolo WAS >> | 32 | 2005 | R | 57 | 35 | 32 | 13 | 11 | 4.22 | .321 | 1.40 | 10.1 | 2.5 | 5.5 | 200.1 | 225 | 107 | 94 | 23 | 56 | 123 | 4 | 0 | 0 | 0 | 17 | 3 | 5 | 4.15 |