| SP | Kluber, C.Kluber, Corey # >> | 31 | 2017 | R | 96 | 14 | 14 | 4 | 8 | 4.59 | .280 | 1.15 | 8.6 | 1.7 | 12.3 | 102.0 | 98 | 52 | 52 | 15 | 19 | 139 | 0 | 0 | 0 | 0 | 8 | 2 | 3 | 2.80 |
| SP | Darvish, Y.Darvish, Yu >> | 26 | 2013 | R | 80 | 14 | 14 | 3 | 9 | 5.63 | .343 | 1.55 | 8.4 | 5.5 | 9.9 | 88.0 | 82 | 57 | 55 | 14 | 54 | 97 | 0 | 0 | 0 | 0 | 5 | 2 | 2 | 4.77 |
| SP | Syndergaard, N.Syndergaard, Noah >> | 22 | 2015 | R | 58 | 14 | 14 | 5 | 6 | 5.56 | .330 | 1.44 | 10.2 | 2.8 | 10.8 | 87.1 | 99 | 54 | 54 | 12 | 27 | 104 | 0 | 0 | 0 | 0 | 5 | 3 | 1 | 3.44 |
| SP | Paxton, J.Paxton, James >> | 29 | 2018 | L | 46 | 14 | 14 | 4 | 6 | 6.08 | .344 | 1.56 | 11.3 | 2.7 | 9.9 | 77.0 | 97 | 55 | 52 | 11 | 23 | 85 | 0 | 0 | 0 | 0 | 4 | 1 | 2 | 3.58 |
| RP | Benoit, J.Benoit, Joaquin >> | 33 | 2010 | R | 95 | 38 | 0 | 0 | 2 | 3.75 | .282 | 1.14 | 7.9 | 2.5 | 9.6 | 57.2 | 50 | 24 | 24 | 11 | 16 | 61 | 0 | 1 | 2 | 0 | 0 | 2 | 0 | 4.32 |
| RP | Parker, B.Parker, Blake >> | 32 | 2017 | R | 80 | 39 | 0 | 2 | 2 | 4.96 | .303 | 1.26 | 8.8 | 2.6 | 10.8 | 45.1 | 44 | 28 | 25 | 7 | 13 | 54 | 0 | 2 | 0 | 0 | 0 | 2 | 1 | 3.62 |
| RP | Osuna, R.Osuna, Roberto >> | 22 | 2017 | R | 63 | 32 | 0 | 3 | 1 | 5.14 | .331 | 1.43 | 9.3 | 3.6 | 10.0 | 35.0 | 36 | 20 | 20 | 7 | 14 | 39 | 0 | 3 | 1 | 0 | 0 | 2 | 1 | 4.74 |
| RP | Papelbon, J.Papelbon, Jonathan >> | 34 | 2014 | R | 47 | 24 | 0 | 0 | 2 | 3.20 | .309 | 1.30 | 8.3 | 3.6 | 9.0 | 25.1 | 23 | 9 | 9 | 2 | 10 | 25 | 0 | 4 | 0 | 0 | 0 | 1 | 1 | 3.36 |
| RP | Smith, C.Smith, Carson >> | 25 | 2015 | R | 37 | 17 | 0 | 1 | 1 | 3.26 | .275 | 1.03 | 7.1 | 2.4 | 10.4 | 19.1 | 15 | 7 | 7 | 3 | 5 | 22 | 0 | 3 | 1 | 0 | 0 | 2 | 0 | 3.84 |
| SP | Kennedy, I.Kennedy, Ian >> | 27 | 2011 | R | 45 | 0 | 0 | 0 | 0 | - | .000 | - | - | - | - | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
| SP | Zimmermann, J.Zimmermann, Jordan >> | 28 | 2014 | R | 36 | 7 | 0 | 1 | 0 | 1.29 | .344 | 1.57 | 11.6 | 2.6 | 6.4 | 7.0 | 9 | 2 | 1 | 0 | 2 | 5 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2.43 |