| John O'Brien | |
| Height Ft: | 6 |
| Height In: | 1 |
| Weight Lb: | 210 |
| Birth Date: | 1916 |
| Death Date: | June 16, 1994 (aged 77) |
| Death Place: | Windsor, Connecticut |
| Nationality: | American |
| High School: | Windsor (Windsor, Connecticut) |
| College: | Columbia (1935–1938) |
| Career Position: | Guard |
| Years1: | 1940–1941 |
| Team1: | New York Gothams |
| Years2: | 1941 |
| Team2: | Akron Goodyear Wingfoots |
| Years3: | 1942–194? |
| Team3: | Brooklyn Visitations |
| Years4: | 194?–194? |
| Team4: | Hartford Hurricanes |
| Cyears1: | 194?–194? |
| Cteam1: | Hartford Hurricanes |
| Highlights: |
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John J. O'Brien, Jr. (1916 – June 16, 1994)[1] [2] was an American professional basketball player.[3] He played in the National Basketball League for the Akron Goodyear Wingfoots during the 1941–42 season.[3] In 1952, he became a referee for the National Basketball Association.[1]