Jack O'Brien boxer
- bouts
- 2
- won
- 0
- lost
- 0
- draw
- 2
- Status
- inactive
- Division
- -
- Debut
- 1920-11-05
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1920-11-23 | Johnny Karns | debut | Fern Hall Athletic Club, Denver | DRAW Points |
| 1920-11-05 | Joyce Fish | debut | Fern Hall Athletic Club, Denver | DRAW Points |