Jack O'Brien boxer
- bouts
- 4
- won
- 3
- lost
- 1
- draw
- 0
- Status
- inactive
- Division
- lightweight
- Debut
- 1924-05-13
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1928-11-09 | Bert Lewis | debut | Oklahoma City | WIN KO |
| 1924-10-30 | Billy O'Neil | debut | Young Men's Athletic Association, Oklahoma City | WIN KO |
| 1924-06-27 | Donald Greer | WWWD | Star Airdome, Oklahoma City | LOST Points |