Jack O'Brien boxer
- bouts
- 5
- won
- 1
- lost
- 4
- draw
- 0
- Status
- inactive
- Division
- -
- Debut
- 1908-07-13
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- United Kingdom
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1920-10-14 | Wally Buckley | WWWWW | Liverpool Stadium, Pudsey Street, Liverpool | LOST Technical knockout |
| 1920-09-16 | Slogger Davies | WLLL | Liverpool Stadium, Pudsey Street, Liverpool | WIN KO |
| 1916-03-25 | Jim Riley | L | Prince's Theatre, Preston | LOST Points |
| 1916-02-10 | Berrys Nipper | debut | Liverpool Stadium, Pudsey Street, Liverpool | LOST Technical knockout |
| 1908-07-13 | Tom Gibbons | debut | Curzon Hall, Birmingham | LOST KO |