Thomas J. Gillen
- Bats Unknown, Throws Unknown
- Height 5' 8", Weight 160 lb.
- Debut April 18, 1884
- Final Game September 15, 1886
- Born May 18, 1862 in Philadelphia, PA USA
- Died January 26, 1889 in Philadelphia, PA USA
Tom Gillen played in both the Union Association and the National League, as well as for a couple of minor league teams. He is listed as the regular catcher for the Philadelphia Keystones in 1884. Although he appeared in only 27 games at catcher, that was more than anyone else.
Gillen was born in Philadelphia, PA, and played for the Philadelphia team at age 22. He died young at age 26.