Jack O'Brien pugile
- combattimenti
- 7
- vinto
- 4
- perduto
- 2
- pareggiare
- 1
- Stato
- inactive
- Divisione
- welterweight
- Debutto
- 1930-08-20
- Altezza
- -
- Arrivare a
- -
- Età
- -
- Nato
- -
- Morte
- -
- Nazionalità
- Australia
| Data | Avversario | Ultimi risultati degli avversari | Luogo | Risultato |
|---|---|---|---|---|
| 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 |