Jack O'Brien boxeador
- luta
- 5
- vitória
- 0
- derrota
- 5
- empate
- 0
- Estado
- inactive
- divisão
- super lightweight
- Estreia
- 1896-02-11
- Altura
- -
- Alcance
- -
- Idade
- -
- Born
- -
- Death
- -
- Nascimento
- United Kingdom
| Data | Adversário | Últimos resultados dos adversários | Lugar | Resultado |
|---|---|---|---|---|
| 1909-04-03 | Mike Mobbs | WLWWLL | Britannia Theatre, Hoxton | LOST Points |
| 1903-10-15 | Jack Andrews | WLLLL | National Sporting Club, Covent Garden | LOST KO |
| 1899-11-13 | Jack Rowe | debut | National Sporting Club, Covent Garden | LOST Points |
| 1898-10-03 | Bill Dean | debut | National Sporting Club, Covent Garden | LOST KO |
| 1896-02-11 | Jewey Cook | WWLWWL | Excelsior Hall, Bethnal Green | LOST Points |