Young Jack O'Brien boxer
- bouts
- 2
- won
- 0
- lost
- 2
- draw
- 0
- Status
- inactive
- Division
- bantamweight
- Debut
- 1911-03-03
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1914-08-13 | Artie Armstrong | DLLWL | Aurora | LOST KO |
| 1911-03-03 | Jack Tierney | DLLLLD | Tri-City AC, Jeffersonville | LOST Technical knockout |