Harry O'Brien boxer
- bouts
- 12
- won
- 5
- lost
- 7
- draw
- 0
- Status
- inactive
- Division
- bantamweight
- Debut
- 1923-12-21
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Australia
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1925-03-10 | Kinsellla | debut | Coo-ee City, Perth | LOST Points |
| 1925-03-09 | Mulga Brown | WDWLLL | Coo-ee City, Perth | LOST Technical knockout |
| 1925-02-27 | Harry Davidson | LLWLD | Coo-ee City, Perth | LOST Points |
| 1925-02-26 | George Lee | WDWLWD | Coo-ee City, Perth | LOST Points |
| 1924-11-14 | George Scott | WLW | White City Stadium, Perth | WIN Points |
| 1924-11-06 | Jack Jefferies | debut | White City Stadium, Perth | WIN Points |
| 1924-10-27 | Speechley | debut | White City Stadium, Perth | WIN KO |
| 1924-05-02 | Ernie Hickling | LWWLL | White City Stadium, Perth | LOST KO |
| 1924-03-12 | R Bassilli | debut | Carnival Square, Perth | LOST Points |
| 1924-01-30 | J Phillips | debut | Uglieland, Perth | WIN Technical knockout |
| 1923-12-27 | J (Young) Campbell | DLWWWW | White City Stadium, Perth | LOST Points |
| 1923-12-21 | McCoy | debut | White City Stadium, Perth | WIN Points |