Jack O'Brien boxer
- bouts
- 4
- won
- 1
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- light heavyweight
- Debut
- 1928-06-20
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Australia
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1935-11-29 | Tommy Jones | LLWWWW | Fitzroy Stadium, Melbourne | LOST Technical knockout |
| 1931-06-05 | Jack Pearce | debut | Fitzroy Stadium, Melbourne | WIN KO |
| 1929-03-13 | Merv Riley | W | West Melbourne Stadium, Melbourne | LOST Points |
| 1928-06-20 | Pat Redmond | WWW | Sydney Stadium, Sydney | LOST KO |
