Dennis O'Brien boxer
- bouts
- 1
- won
- 0
- lost
- 1
- draw
- 0
- Status
- inactive
- Division
- heavyweight
- Debut
- 1940-02-27
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1940-02-27 | George Leslie | debut | Westchester County Center, White Plains | LOST KO |