| Bunny Roser | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | 15 November 1901 |
| Birth Place: | St. Louis, Missouri |
| Death Place: | Rocky Hill, Connecticut |
| Debutleague: | MLB |
| Debutdate: | August 24 |
| Debutyear: | 1922 |
| Debutteam: | Boston Braves |
| Finalleague: | MLB |
| Finaldate: | September 22 |
| Finalyear: | 1922 |
| Finalteam: | Boston Braves |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .239 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 16 |
| Teams: | |
John Williams Joseph "Bunny" Roser (November 15, 1901 – May 6, 1979) nicknamed "Jack", was a professional baseball player. He was an outfielder for one season (1923) with the Boston Braves. For his career, he compiled a .239 batting average in 113 at-bats, with 16 runs batted in.
He was born in St. Louis, Missouri and died in Rocky Hill, Connecticut at the age of 77.