| John Magner | |
| Position: | Outfielder |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 1855 |
| Birth Place: | St. Louis, Missouri |
| Death Date: | Unknown |
| Debutleague: | MLB |
| Debutdate: | July 14 |
| Debutyear: | 1879 |
| Debutteam: | Cincinnati Reds |
| Finalleague: | MLB |
| Finaldate: | July 14 |
| Finalyear: | 1879 |
| Finalteam: | Cincinnati Reds |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | At bats |
| Stat2value: | 4 |
| Stat3label: | Runs batted in |
| Stat3value: | 1 |
| Teams: | |
John T. Magner was a professional baseball outfielder. He played one game in Major League Baseball for the Cincinnati Reds on July 14, 1879.