| Full name: | John Joseph O'Brien |
| Born: | 1886 |
| Died: | 20th December 1939, Napier, Hawke's Bay, New Zealand |
| Batting: | Right-hand batter |
| Bowling: | Right-arm medium-fast |
| Relations: | Son: MA O'Brien |
| Teams: | Hawke's Bay (Main FC: 1905/06-1920/21); All teams |
| Lists of matches and more detailed statistics | |
| First-Class Career Batting and Fielding (1905/06-1920/21) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Hawke's Bay | 14 | 27 | 4 | 314 | 39 | 13.65 | 0 | 0 | 8 | |
| First-Class Career Bowling (1905/06-1920/21) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Hawke's Bay | 638 | 8 | 735 | 27 | 5-55 | 27.22 | 1 | 0 | 58.00 | 4.42 |