George Proeser had a 3-4 record with an ERA of 3.81 and 20 strikeouts in 7 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 |  | G. Proeser | 1888 | CLE | 7 | 3 | 4 | .429 | 7 | 3.81 | 20 | 7 | 1 | 0 | 59.0 | 53 | 25 | 39 | 4 | 30 | 7 | 0 | 266 | 7 | 3.05 | 4.58 | 0.67 | 0.61 | 7.5 | 11.3 | 1.41 | .239 | 5.95 | 125 | 4.67 | 159 | 8.08 | -11.4 |
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