Jack O'Brien boxer
- bouts
- 2
- won
- 0
- lost
- 0
- draw
- 2
- Status
- inactive
- Division
- heavyweight
- Debut
- 1929-02-18
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1937-03-15 | Leo Barrone | LWLL | Fox Theater, Butte | DRAW Points |
| 1937-02-22 | Tommy Lynch | DWWDWW | Fox Theater, Butte | DRAW Points |
| 1929-02-18 | Urban Liberty | WLWLLW | Auditorium, Minneapolis | LOST |