Johnny O'Brien boxeador
- luta
- 7
- vitória
- 1
- derrota
- 5
- empate
- 1
- Estado
- inactive
- divisão
- lightweight
- Estreia
- 1916-04-06
- Altura
- -
- Alcance
- -
- Idade
- -
- Born
- -
- Death
- -
- Nascimento
- USA
| Data | Adversário | Últimos resultados dos adversários | Lugar | Resultado |
|---|---|---|---|---|
| 1921-01-04 | Young Donahue | LWWWWL | Mechanics Building, Boston | LOST Points |
| 1920-09-21 | Tommy Nee | WWLLDW | Mechanics Building, Boston | LOST Points |
| 1918-12-23 | Young Marka | debut | Central A.C., Boston | LOST Points |
| 1916-08-08 | Al Gerard | LW | Armory A.A., Boston | LOST KO |
| 1916-08-04 | J. Campi | debut | Commercial A.C., Boston | WIN Points |
| 1916-07-21 | Louis Leonard | debut | Commercial A.C., Boston | DRAW Points |
| 1916-04-06 | Teddy Murphy | WWLWWW | Academy of Music, Lowell | LOST Points |