John Kirby played 5 seasons for 5 teams, including the Maroons and Cowboys. He had 18 wins, 50 losses, an ERA of 4.09 and 200 strikeouts.
| NAME | SEASON | TM | G | W | L | W% | GS | 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 |  | J. Kirby | 1884 | KCC | 2 | 0 | 1 | .000 | 2 | 4.09 | 1 | 1 | 0 | 0 | 11.0 | 13 | 5 | 10 | 0 | 2 | 0 | 49 | 1 | 0.82 | 1.64 | 0.50 | 0.00 | 2.0 | 4.1 | 1.36 | 8.18 | 143 | 3.64 | 146 | 10.64 | -1.7 | |||
| 2 | | J. Kirby | 1885 | SLN | 14 | 5 | 8 | .385 | 14 | 3.55 | 46 | 14 | 0 | 0 | 129.1 | 118 | 51 | 66 | 0 | 44 | 0 | 534 | 10 | 3.20 | 3.06 | 1.05 | 0.00 | 8.6 | 8.2 | 1.25 | 4.59 | 130 | 3.19 | 109 | 8.21 | -4.8 | |||
| 3 | | J. Kirby | 1886 | SLN | 41 | 11 | 26 | .297 | 41 | 3.30 | 129 | 38 | 1 | 0 | 325.0 | 329 | 119 | 222 | 9 | 134 | 0 | 1,438 | 43 | 3.57 | 3.71 | 0.96 | 0.25 | 9.0 | 9.3 | 1.42 | 6.15 | 103 | 3.90 | 122 | 9.11 | -28.4 | |||
| 4 | | J. Kirby | 1887 | TOT | 13 | 1 | 11 | .083 | 13 | 7.25 | 13 | 10 | 0 | 0 | 103.0 | 132 | 83 | 117 | 4 | 71 | 4 | 0 | 515 | 12 | 1.14 | 6.20 | 0.18 | 0.35 | 2.5 | 13.8 | 1.97 | .303 | 10.22 | 174 | 5.71 | 136 | 11.53 | -17.5 | |
| 5 | | J. Kirby | 1888 | KCC | 5 | 1 | 4 | .200 | 5 | 4.19 | 11 | 5 | 0 | 0 | 43.0 | 48 | 20 | 36 | 0 | 7 | 1 | 0 | 184 | 9 | 2.30 | 1.47 | 1.57 | 0.00 | 6.0 | 3.8 | 1.28 | .291 | 7.53 | 128 | 2.63 | 84 | 10.05 | 2.9 | |
| Total | 75 | 18 | 50 | .265 | 75 | 4.09 | 200 | 68 | 1 | 0 | 611.1 | 640 | 278 | 451 | 13 | 258 | 5 | 0 | 2,720 | 75 | 2.94 | 3.80 | 0.78 | 0.19 | 7.4 | 9.5 | 1.47 | .279 | 6.64 | 123 | 3.96 | 119 | 9.42 | -49.5 |
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