| Full name: | Matthew Alexander O'Brien |
| Born: | 26th July 1910, Napier, Hawke's Bay, New Zealand |
| Died: | 12th November 1974, Lower Hutt, Wellington, New Zealand |
| Batting: | Right-hand batter |
| Bowling: | Right-arm fast-medium |
| Relations: | Father: JJ O'Brien |
| Teams: | Wellington (Main FC: 1932/33-1941/42); All teams |
| Lists of matches and more detailed statistics | |
| First-Class Career Batting and Fielding (1932/33-1943/44) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 15 | 28 | 2 | 685 | 76* | 26.34 | 0 | 4 | 11 | |
| First-Class Career Bowling (1932/33-1943/44) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Overall | 78 | 2 | 39 | 0 | 0-16 | 3.00 | ||||