Pat O'Brien boxer
- bouts
- 11
- won
- 4
- lost
- 5
- draw
- 2
- Status
- inactive
- Division
- featherweight
- Debut
- 1937-03-01
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1938-01-31 | Joe Tambe | LLLLLW | Marigold Gardens, Chicago | WIN Points |
| 1937-10-18 | Joey Chizar | LDLWLL | Marigold Gardens, Chicago | LOST Points |
| 1937-08-12 | George Feist | WLLWWW | Riverview Rink, Milwaukee | LOST Points |
| 1937-07-12 | George Feist | LLWLLW | Marigold Gardens Outdoor Arena, Chicago | LOST Technical knockout |
| 1937-06-14 | George Feist | WLLWLL | Marigold Gardens Outdoor Arena, Chicago | LOST Points |
| 1937-05-24 | Babe LaVarre | WWWLLL | Marigold Gardens Outdoor Arena, Chicago | WIN Points |
| 1937-05-12 | Willie Dudlack | LLLLL | Auditorium, Milwaukee | WIN Points |
| 1937-04-30 | Frankie Jarr | LLWWLW | Majestic Arena, Chicago | LOST Points |
| 1937-04-05 | Willie Dudlack | LLLLL | Eagles Club, Milwaukee | WIN Points |
| 1937-03-15 | Ray Blum | LWWLLD | Eagles Club, Milwaukee | DRAW Points |
| 1937-03-01 | Ray Blum | LLWWLL | Eagles Club, Milwaukee | DRAW Points |