Jack O'Brien boxeur
- combats
- 5
- gagnés
- 1
- perdus
- 1
- match nul
- 2
- Situation
- inactive
- Division
- -
- Début
- 1909-02-16
- Taille
- -
- Allonge
- -
- âge
- -
- Né
- -
- Décès
- -
- Nationalité
- USA
| Date | Adversaire | Derniers résultats des adversaires | Lieu | Result |
|---|---|---|---|---|
| 1914-12-10 | Buddy Dolan | D | Unity Cycle Club, Lawrence | LOST KO |
| 1910-03-01 | Connie Barnes | W | Associate Hall, Lowell | DRAW Points |
| 1909-03-25 | Billy Mulvey | debut | Conlon Building, Lowell | DRAW Points |
| 1909-02-22 | Frank Kennedy | debut | Conlon Building, Lowell | NC No Contest |
| 1909-02-16 | Young Sullivan | W | Conlon Building, Lowell | WIN Points |