| Tom Leahy | |
| Position: | Catcher |
| Throws: | Right |
| Birth Date: | June 2, 1869 |
| Birth Place: | New Haven, Connecticut |
| Death Place: | New Haven, Connecticut |
| Debutleague: | MLB |
| Debutdate: | May 18 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | October 7 |
| Finalteam: | St. Louis Cardinals |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .256 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 42 |
| Teams: |
|
Thomas Joseph Leahy (June 2, 1869 – June 11, 1951) was a professional baseball player. He played all or part of four seasons in Major League Baseball, between 1897 and 1905, for the Pittsburgh Pirates, the Washington Senators, the Milwaukee Brewers, the Philadelphia Athletics, and the St. Louis Cardinals, primarily as a catcher.