Jack O'Brien boxeador
- luta
- 15
- vitória
- 6
- derrota
- 7
- empate
- 2
- Estado
- inactive
- divisão
- middleweight
- Estreia
- 1931-08-26
- Altura
- -
- Alcance
- -
- Idade
- -
- Born
- -
- Death
- -
- Nascimento
- United Kingdom
| Data | Adversário | Últimos resultados dos adversários | Lugar | Resultado |
|---|---|---|---|---|
| 1935-11-04 | Frank Clements | LLLLLL | Arena, Belfast | DRAW Points |
| 1935-10-24 | Eddie Steele Martin | WWWW | Ulster Hall, Belfast | LOST Points |
| 1935-09-25 | Willie Duncan | LWWLLL | Arena, Belfast | WIN Technical knockout |
| 1935-03-16 | Bushman Dempster | WDLLWW | The Ring, Belfast | WIN Points |
| 1935-03-09 | Tommy Burns | WDLLLL | The Ring, Belfast | DRAW Points |
| 1935-01-30 | Darky Ellis | WWWWWD | Arcadia, Scarborough | LOST Points |
| 1935-01-21 | Tom Richwood | WDDWW | New St James Hall, Newcastle | LOST Points |
| 1934-12-17 | Charlie McDonald | LWLWLL | New St James Hall, Newcastle | LOST Points |
| 1933-12-31 | Johnny (Young) Summers | LLWWLL | Belfast | WIN Points |
| 1933-04-14 | George Gordon | WLLLWW | Belfast | WIN Corner retirement |
| 1932-11-07 | Glen Moody | WLWLWL | Windsor Hall, Bradford | LOST Points |
| 1932-02-22 | Fred Shaw | WLLDLL | Windsor Hall, Bradford | LOST Points |
| 1931-12-21 | Young Rea | debut | St Marys Hall, Belfast | WIN KO |
| 1931-10-06 | Jim Winters | WWWWWW | Music Hall, Edinburgh | LOST Points |
| 1931-08-26 | Alf Noble | LWLLWL | Winter Gardens, Morecambe | WIN Corner retirement |