Reg O'Brien boxer
- bouts
- 9
- won
- 2
- lost
- 6
- draw
- 0
- Status
- inactive
- Division
- welterweight
- Debut
- 1919-07-30
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Australia
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1922-09-23 | Jim Duncan | WL | Sydney Stadium, Sydney | LOST Points |
| 1922-07-19 | Billy Weir | LWLLLW | Hippodrome, Sydney | WIN Points |
| 1922-05-24 | Fred Williams | WWWWLL | National Theatre, Balmain, Sydney | LOST Points |
| 1922-05-03 | Pat McDermott | debut | National Theatre, Balmain, Sydney | LOST Points |
| 1921-06-18 | Alf McKenna | LWL | Sydney Stadium, Sydney | LOST Points |
| 1919-07-30 | Jack Thomas | WL | Sydney Stadium, Sydney | NC |