Cinders O'Brien had an 11-19 record with an ERA of 3.30 and 135 strikeouts in 30 appearances in his rookie season in 1888.
| 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 |  | C. O'Brien | 1888 | CLE | 30 | 11 | 19 | .367 | 30 | 3.30 | 135 | 30 | 1 | 0 | 259.0 | 245 | 95 | 162 | 5 | 99 | 12 | 0 | 1,129 | 37 | 4.69 | 3.44 | 1.36 | 0.17 | 12.0 | 8.8 | 1.33 | .273 | 5.63 | 108 | 3.08 | 105 | 8.51 | -4.1 |
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