Jack O'Brien boxer
- bouts
- 0
- won
- 0
- lost
- 0
- draw
- 0
- Status
- inactive
- Division
- welterweight
- Debut
- 1922-09-21
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1924-10-20 | Cannonball Cote | LLWDWD | Exposition Building, Portland | LOST |
| 1922-09-21 | Young Harry Wills | LLWD | Brewer | WIN |