Jack O'Brien boxer
- bouts
- 5
- won
- 0
- lost
- 5
- draw
- 0
- Status
- inactive
- Division
- super lightweight
- Debut
- 1896-02-11
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- United Kingdom
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1909-04-03 | Mike Mobbs | WLWWLL | Britannia Theatre, Hoxton | LOST Points |
| 1903-10-15 | Jack Andrews | WLLLL | National Sporting Club, Covent Garden | LOST KO |
| 1899-11-13 | Jack Rowe | debut | National Sporting Club, Covent Garden | LOST Points |
| 1898-10-03 | Bill Dean | debut | National Sporting Club, Covent Garden | LOST KO |
| 1896-02-11 | Jewey Cook | WWLWWL | Excelsior Hall, Bethnal Green | LOST Points |