Battling Jack O'Brien boxeador
- luta
- 7
- vitória
- 4
- derrota
- 1
- empate
- 2
- Estado
- inactive
- divisão
- flyweight
- Estreia
- 1927-10-04
- Altura
- -
- Alcance
- -
- Idade
- -
- Born
- -
- Death
- -
- Nascimento
- USA
| Data | Adversário | Últimos resultados dos adversários | Lugar | Resultado |
|---|---|---|---|---|
| 1930-07-29 | Albert Allen | debut | Waterfront Park, Saint Petersburg | WIN Points |
| 1928-05-28 | Young Granado | WDWLWW | Cuban Club, Tampa | LOST KO |
| 1928-05-01 | Willie Green | LLDD | Waterfront Park, Saint Petersburg | WIN Points |
| 1928-01-10 | Joe Rodriguez | DWWWWW | Waterfront Park, Saint Petersburg | WIN Points |
| 1928-01-05 | Battling Oscar | LL | Waterfront Park, Saint Petersburg | WIN Technical knockout |
| 1927-10-04 | Oscar Ayala | debut | Waterfront Park, Saint Petersburg | DRAW Points |