| Doc Kerr | |
| Position: | Catcher |
| Bats: | Both |
| Throws: | Right |
| Birth Date: | January 17, 1882 |
| Birth Place: | Dellroy, Ohio |
| Death Place: | Baltimore, Maryland |
| Debutleague: | MLB |
| Debutdate: | April 22 |
| Debutteam: | Pittsburgh Rebels |
| Finalleague: | MLB |
| Finaldate: | August 26 |
| Finalteam: | Baltimore Terrapins |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .252 |
| Stat2label: | Home runs |
| Stat2value: | 1 |
| Stat3label: | Runs batted in |
| Stat3value: | 8 |
| Teams: | |
John Jonas "Doc" Kerr (January 17, 1882 – January 9, 1937) was a Major League Baseball player who played for the Pittsburgh Rebels and the Baltimore Terrapins in and .