Raymond Joseph O'Brien (October 31, 1894 – March 31, 1942) was a professional baseball player. He played a total of 16 games as an outfielder for the 1916 Pittsburgh Pirates. From 1913 to 1932, O'Brien also played for various minor league teams.
Ray O'Brien
| Given name: | Raymond Joseph O'Brien |
| Nicknames: | None |
| Primary Pos: | Leftfield |
| Hght/Wght: | 5'9" / 175 lbs |
| Bats/Throws: | L / L |
| Born: | Oct 31, 1894 in St. Louis, MO |
| Died: | Mar 31, 1942 in Richmond Heights, MO (47 years old) |
| Debut: | Jun 27, 1916 |