| John Callahan | |
|---|---|
| Pitcher | |
| Born: Moberly, Missouri | |
| Batted: | Threw: |
| MLB debut | |
| September 3, 1898 for the St. Louis Browns | |
| Last MLB appearance | |
| September 4, 1898 for the St. Louis Browns | |
| Career statistics | |
| Win–loss record | 0-2 |
| Strikeouts | 2 |
| Earned run average | 16.20 |
| Teams | |
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John W. Callahan was an American Major League Baseball pitcher. He played for the St. Louis Browns during the 1898 season.