John O'Brien boxer
- bouts
- 0
- won
- 0
- lost
- 0
- draw
- 0
- Status
- inactive
- Division
- -
- Debut
- 1920-02-24
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1921-09-05 | Frankie Welsh | LWWWW | Kankakee | DRAW |
| 1921-08-13 | Charley Kenny | debut | Sager's Arena, Aurora | DRAW |
| 1921-03-10 | Jim Cawley | W | Indiana Harbor | WIN |
| 1920-02-24 | Eddie Raynor | debut | Aurora | LOST |