George Joseph O'Brien (November 4, 1889 – March 24, 1966) was an American professional baseball player and college sports coach and administrator. He played Major League Baseball as a catcher for the St. Louis Browns in 1915. O'Brien later coached and served as athletic director at Mount Union College—now known as the University of Mount Union—in Alliance, Ohio.
George O'Brien
| Given name: | George Joseph O'Brien |
| Nicknames: | None |
| Primary Pos: | Catcher |
| Hght/Wght: | 6'0" / 185 lbs |
| Bats/Throws: | R / R |
| Born: | Nov 4, 1889 in Cleveland, OH |
| Died: | Mar 24, 1966 in Columbus, OH (76 years old) |
| Debut: | Aug 16, 1915 |