Leo David Callahan (August 9, 1890 – May 2, 1982) is an American former professional baseball player who played outfield for the 1913 Brooklyn Dodgers and the 1919 Philadelphia Phillies.
Leo Callahan
| Given name: | Leo David Callahan |
| Nicknames: | None |
| Primary Pos: | Rightfield |
| Hght/Wght: | 5'8" / 142 lbs |
| Bats/Throws: | L / L |
| Born: | Aug 9, 1890 in Jamaica Plain, MA |
| Died: | May 2, 1982 in Erie, PA (91 years old) |
| Debut: | Apr 9, 1913 |