Wildcat Willie O'Brien boxer
- bouts
- 10
- won
- 1
- lost
- 6
- draw
- 2
- Status
- inactive
- Division
- welterweight
- Debut
- 1922-06-16
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1930-02-13 | Floyd Soldier Brown | DWWDLW | Greenwich Coliseum, Tacoma | LOST Points |
| 1930-01-29 | Phil Rispoli | debut | Crystal Pool, Seattle | LOST Points |
| 1929-09-17 | Joe Townsend | WWDDWD | Civic Ice Arena, Seattle | LOST Points |
| 1929-05-09 | Tommy Jeffers | WWW | Greenwich Coliseum, Tacoma | DRAW Points |
| 1929-04-04 | Norman Jones | debut | Tacoma | LOST Points |
| 1928-03-29 | Walter Cleghorn | WWWDWW | Greenwich Coliseum, Tacoma | LOST Points |
| 1928-02-06 | Jack Napier | LLLLWL | Olympic A.C., Tacoma | DRAW Points |
| 1928-01-30 | Ray Dempsey | L | Olympic A.C., Tacoma | WIN Points |
| 1927-12-30 | Joe Hansler | debut | Midland A.C., Midland | LOST Points |
| 1922-06-16 | Tex Ray | LW | Business Men's A.C., Wichita | NC |