William O'Brien boxer
- bouts
- 3
- won
- 0
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- lightweight
- Debut
- 1892-05-25
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- New Zealand
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1892-09-26 | Tom Partridge | debut | Zealandia Rink, Auckland | LOST KO |
| 1892-09-05 | Jim Saxon | LLWW | Zealandia Rink, Auckland | LOST KO |
| 1892-05-25 | Jack Nicholson | WLDLW | Zealandia Rink, Auckland | LOST KO |