| NAME | GS | SEASON | TM | G | W | L | W% | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | G. Cole | 32 | 2015 |  PIT | 32 | 19 | 8 | .704 | 2.60 | 202 | 0 | 0 | 0 | 208.0 | 183 | 60 | 71 | 11 | 44 | 10 | 0 | 1 | 832 | 7 | 8.74 | 1.90 | 4.59 | 0.48 | 24.3 | 5.3 | 1.09 | .304 | 3.07 | 68 | 2.65 | 70 | 7.92 | 26.9 |
| 2 |  | F. Liriano | 31 | 2015 | PIT | 31 | 12 | 7 | .632 | 3.38 | 205 | 0 | 0 | 0 | 186.2 | 155 | 70 | 75 | 15 | 70 | 5 | 0 | 1 | 773 | 10 | 9.88 | 3.38 | 2.93 | 0.72 | 26.5 | 9.1 | 1.21 | .293 | 3.62 | 88 | 3.18 | 84 | 7.47 | 12.9 |
| 3 | | J. Locke | 30 | 2015 | PIT | 30 | 8 | 11 | .421 | 4.49 | 129 | 0 | 0 | 0 | 168.1 | 179 | 84 | 95 | 15 | 60 | 7 | 0 | 4 | 736 | 5 | 6.90 | 3.21 | 2.15 | 0.80 | 17.5 | 8.2 | 1.42 | .312 | 5.08 | 117 | 3.95 | 104 | 9.57 | -3 |
| 4 | | A.J. Burnett | 26 | 2015 | PIT | 26 | 9 | 7 | .563 | 3.18 | 143 | 0 | 0 | 0 | 164.0 | 174 | 58 | 64 | 11 | 49 | 11 | 0 | 2 | 699 | 6 | 7.85 | 2.69 | 2.92 | 0.60 | 20.5 | 7.0 | 1.36 | .336 | 3.51 | 83 | 3.35 | 88 | 9.55 | 8.2 |
| 5 |  | C. Morton | 23 | 2015 | PIT | 23 | 9 | 9 | .500 | 4.81 | 96 | 0 | 0 | 0 | 129.0 | 137 | 69 | 77 | 13 | 41 | 12 | 0 | 6 | 563 | 2 | 6.70 | 2.86 | 2.34 | 0.91 | 17.1 | 7.3 | 1.38 | .309 | 5.37 | 126 | 4.18 | 110 | 9.56 | -5.7 |
| 6 |  | J.A. Happ | 11 | 2015 | PIT | 11 | 7 | 2 | .778 | 1.85 | 69 | 0 | 0 | 0 | 63.1 | 52 | 13 | 13 | 3 | 13 | 0 | 0 | 1 | 249 | 2 | 9.81 | 1.85 | 5.31 | 0.43 | 27.7 | 5.2 | 1.03 | .299 | 1.85 | 48 | 2.18 | 57 | 7.39 | 11.6 |
| 7 | | V. Worley | 8 | 2015 | PIT | 23 | 4 | 6 | .400 | 4.02 | 49 | 0 | 0 | 0 | 71.2 | 81 | 32 | 36 | 6 | 21 | 2 | 6 | 3 | 310 | 3 | 6.15 | 2.64 | 2.33 | 0.75 | 15.8 | 6.8 | 1.42 | .323 | 4.52 | 105 | 3.81 | 100 | 10.17 | -0.2 |
| 8 | | C. Sadler | 1 | 2015 | PIT | 1 | 1 | 0 | 1.000 | 3.60 | 5 | 0 | 0 | 0 | 5.0 | 4 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 19 | 0 | 9.00 | 1.80 | 5.00 | 1.80 | 26.3 | 5.3 | 1.00 | .250 | 3.60 | 94 | 4.33 | 114 | 7.20 | -0.3 |
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