English Jack O'Brien boxer
- bouts
- 4
- won
- 4
- lost
- 0
- draw
- 0
- Status
- inactive
- Division
- -
- Debut
- 1903-04-24
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- United Kingdom
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1909-08-06 | Bert Carlson | debut | Manitowoc | WIN KO |
| 1906-05-12 | Tommy Lowe | WLDDWW | Madison Square Garden, New York | DRAW |
| 1903-05-01 | Young Chic Lucas | L | Ariel A.C., Philadelphia | WIN Technical knockout |
| 1903-04-24 | Adam Burke | WL | Ariel A.C., Philadelphia | WIN KO |