| John Mulligan | |
| Position: | Third Baseman |
| Birth Date: | Unknown |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Death Date: | Unknown |
| Bats: | Unknown |
| Throws: | Unknown |
| Debutleague: | MLB |
| Debutdate: | June 14 |
| Debutyear: | 1884 |
| Debutteam: | Washington Nationals |
| Finalleague: | MLB |
| Finaldate: | June 14 |
| Finalyear: | 1884 |
| Finalteam: | Washington Nationals |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat2label: | Hits |
| Stat3label: | RBIs |
| Stat1value: | .250 |
| Stat2value: | 1 |
| Stat3value: | 2 |
| Teams: | |
John Mulligan was an American Major League Baseball third baseman who played in one game on June 14, 1884 for the Washington Nationals of the Union Association. He finished the game with a .250 batting average[1] and a .250 at bat average.