Jack O'Brien boxeador
- combates
- 7
- ganados
- 4
- perdidos
- 2
- empates
- 1
- Estado
- inactive
- División
- welterweight
- Debut
- 1930-08-20
- Altura
- -
- Alcanza
- -
- Edad
- -
- Nacimiento
- -
- Muerte
- -
- Nacionalidad
- Australia
| Fecha | Oponente | Resultados últimos oponentes | Lugar | Resultado |
|---|---|---|---|---|
| 1931-08-01 | Harry Holmes | LWLWWW | West Melbourne Stadium, Melbourne | WIN Technical knockout |
| 1931-06-12 | Mike O'Connor | LWLWDW | Fitzroy Stadium, Melbourne | WIN Points |
| 1931-04-10 | Tom Maloney | WWLWLL | Fitzroy Stadium, Melbourne | LOST Technical knockout |
| 1931-03-13 | Jack 'Cyclone' Darcy | WWWWLL | Fitzroy Stadium, Melbourne | WIN Points |
| 1930-12-24 | Alan Rickards | WWW | Fitzroy Stadium, Fitzroy, Melbourne | DRAW Points |
| 1930-09-20 | Jack Wilson | WWW | West Melbourne Stadium, Melbourne | WIN Points |
| 1930-08-20 | Jack Wilson | WW | West Melbourne Stadium, Melbourne | LOST KO |