| John Mullen | |
| Position: | Catcher |
| Birth Date: | January 1856 |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Death Date: | January 27, 1909 |
| Death Place: | Philadelphia, Pennsylvania, U.S. |
| Bats: | Unknown |
| Throws: | Unknown |
| Debutleague: | MLB |
| Debutdate: | September 9 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | September 9 |
| Finalteam: | Philadelphia Athletics |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | Hits |
| Stat2value: | 0 |
| Stat3label: | At bats |
| Stat3value: | 3 |
| Teams: | |
John Mullen (January 1856 – January 27, 1909) was an American Major League Baseball player. Mullen played for the Philadelphia Athletics in .