Jack O'Brien boxeador
- combates
- 22
- ganados
- 17
- perdidos
- 3
- empates
- 2
- Estado
- inactive
- División
- welterweight
- Debut
- 1928-09-04
- Altura
- -
- Alcanza
- -
- Edad
- -
- Nacimiento
- -
- Muerte
- -
- Nacionalidad
- United Kingdom
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| Fecha | Oponente | Resultados últimos oponentes | Lugar | Resultado |
|---|---|---|---|---|
| 1933-12-15 | Andy McLaughlin | WLWWLL | The Ring, Belfast | WIN Points |
| 1933-10-19 | Jimmy Johnston | debut | The Ring, Belfast | WIN Points |
| 1933-09-17 | Tom (Kid) Larkin | WLWLW | The Ring, Belfast | WIN Points |
| 1933-08-12 | Billy Thomas | WWWLWW | The Ring, Belfast | LOST Points |
| 1933-07-22 | Alex McKechnie | WWWWWW | Grosvenor Park, Belfast | WIN Technical knockout |
| 1933-07-01 | Ian Ritchings | LDLLLL | Grosvenor Park, Belfast | WIN Points |
| 1933-06-22 | Jack Ellis | LDDLLW | Grosvenor Park, Belfast | LOST Points |
| 1933-03-25 | Tommy Connolly | LLDLWW | St Marys Hall, Belfast | LOST Points |
| 1933-03-03 | Eddie Staver | debut | The Ring, Belfast | WIN Points |
| 1933-02-17 | Jack Haynes | LLWWW | St Marys Hall, Belfast | WIN Points |
| 1932-02-10 | George Willis | LLWWLW | St Marys Hall, Belfast | DRAW Points |
| 1931-04-29 | Joe Woodruff | WWLLLW | Belfast Oval Football Ground, Belfast | WIN Corner retirement |
| 1931-02-18 | Jerry Delaney | debut | Ulster Hall, Belfast | WIN Points |
| 1931-02-06 | Fred Shaw | LWLLLW | Ulster Hall, Belfast | WIN Points |
| 1931-02-01 | Joe Woodruff | LLWWLL | National Sporting Club, Leeds | WIN Points |
| 1931-01-21 | Phil Green | WWLLLD | St Marys Hall, Belfast | WIN Points |
| 1930-12-22 | Joe (Young) Lowther | WWWLWL | Ulster Hall, Belfast | DRAW Points |
| 1930-11-12 | Carl Petersen | WLLWWL | Belfast | WIN Points |
| 1930-07-17 | Carl Petersen | LWLLWW | Dunmore Stadium, Belfast | WIN Points |
| 1930-01-29 | Ranger Harkin | LWWWWW | Ulster Hall, Belfast | WIN Points |
| 1929-08-03 | Tommy Connolly | WLLWLL | Grosvenor Park, Belfast | WIN Points |
| 1928-09-04 | Ted McGovern | debut | Trinity Athletic Club, Belfast | WIN Corner retirement |
