| SP | Arrieta, J.Arrieta, Jake $ >> | 29 | 2015 | R | 93 | 21 | 21 | 8 | 7 | 3.68 | .280 | 1.14 | 7.7 | 2.6 | 8.2 | 120.0 | 102 | 50 | 49 | 8 | 35 | 109 | 0 | 0 | 0 | 0 | 14 | 3 | 1 | 3.00 |
| SP | Richard, J.Richard, J.R. >> | 30 | 1980 | R | 90 | 20 | 20 | 11 | 4 | 2.91 | .279 | 1.15 | 6.8 | 3.5 | 7.5 | 142.1 | 108 | 47 | 46 | 8 | 55 | 119 | 2 | 0 | 0 | 1 | 13 | 2 | 2 | 3.26 |
| SP | Mathewson, C.Mathewson, Christy >> | 29 | 1909 | R | 85 | 20 | 20 | 8 | 6 | 2.76 | .275 | 1.14 | 7.5 | 2.8 | 4.8 | 140.0 | 116 | 46 | 43 | 9 | 43 | 75 | 0 | 0 | 0 | 0 | 15 | 0 | 4 | 3.69 |
| SP | Alexander, P.Alexander, Pete † # >> | 28 | 1915 | R | 88 | 19 | 19 | 11 | 4 | 3.32 | .255 | 0.98 | 6.8 | 2.0 | 5.2 | 132.2 | 100 | 52 | 49 | 17 | 30 | 76 | 2 | 0 | 0 | 1 | 13 | 6 | 0 | 4.34 |
| SP | Lincecum, T.Lincecum, Tim >> | 25 | 2009 | R | 39 | 18 | 18 | 6 | 4 | 6.17 | .359 | 1.67 | 10.3 | 4.8 | 7.0 | 81.2 | 93 | 59 | 56 | 6 | 43 | 63 | 1 | 0 | 0 | 0 | 5 | 1 | 5 | 4.04 |
| RP | Chapman, A.Chapman, Aroldis >> | 26 | 2014 | L | 93 | 53 | 0 | 1 | 3 | 2.71 | .314 | 1.34 | 6.8 | 5.3 | 10.1 | 66.1 | 50 | 21 | 20 | 5 | 39 | 74 | 0 | 7 | 0 | 0 | 0 | 2 | 1 | 3.61 |
| RP | Rivera, M.Rivera, Mariano >> | 39 | 2008 | R | 84 | 36 | 0 | 4 | 1 | 2.42 | .283 | 1.16 | 8.6 | 2.0 | 6.8 | 44.2 | 42 | 12 | 12 | 4 | 10 | 33 | 0 | 4 | 3 | 0 | 0 | 1 | 1 | 3.43 |
| RP | Treinen, B.Treinen, Blake >> | 30 | 2018 | R | 78 | 23 | 0 | 2 | 3 | 3.91 | .303 | 1.26 | 7.2 | 4.3 | 7.6 | 25.1 | 20 | 11 | 11 | 2 | 12 | 21 | 0 | 4 | 2 | 0 | 0 | 1 | 0 | 3.92 |
| RP | Eichhorn, M.Eichhorn, Mark >> | 26 | 1986 | R | 48 | 23 | 0 | 4 | 0 | 4.84 | .319 | 1.39 | 9.4 | 3.2 | 7.7 | 48.1 | 50 | 26 | 26 | 5 | 17 | 41 | 0 | 2 | 0 | 0 | 0 | 1 | 1 | 3.77 |