Jimmy O'Brien boxer
- bouts
- 19
- won
- 12
- lost
- 3
- draw
- 4
- Status
- inactive
- Division
- middleweight
- Debut
- 1949-08-15
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1950-04-03 | Ralph Brown | WDWW | Turner's Arena, Washington | DRAW Points |
| 1950-03-27 | Angelo Marini | WWWDLD | Turner's Arena, Washington | LOST Points |
| 1950-03-13 | Angelo Marini | WWWWDL | Turner's Arena, Washington | DRAW Points |
| 1950-03-06 | Billy Hickerson | LLWL | Turner's Arena, Washington | WIN Points |
| 1950-02-20 | Charley Turner | LLLLWL | Coliseum, Baltimore | WIN Points |
| 1950-02-06 | Ralph Brown | W | Turner's Arena, Washington | DRAW Points |
| 1950-01-30 | Nat Johnson | debut | Coliseum, Baltimore | WIN Unanimous decision |
| 1950-01-16 | Ralph Brown | debut | Turner's Arena, Washington | LOST KO |
| 1950-01-02 | Charlie Purvis | D | Coliseum, Baltimore | WIN Majority decision |
| 1949-12-05 | Herb Stoll | L | Coliseum, Baltimore | WIN KO |
| 1949-11-28 | Joe Green | L | Turner's Arena, Washington | WIN KO |
| 1949-11-21 | Herb Stoll | debut | Coliseum, Baltimore | WIN KO |
| 1949-11-18 | Charley Duke | LL | Uline Arena, Washington | WIN Technical knockout |
| 1949-11-07 | Billy Hickerson | debut | Turner's Arena, Washington | WIN Technical knockout |
| 1949-10-31 | Warren Hudson | LW | Turner's Arena, Washington | WIN Points |
| 1949-10-24 | Gene Kelly | debut | Turner's Arena, Washington | WIN KO |
| 1949-09-19 | Don Hubsher | LL | Turner's Arena, Washington | WIN Points |
| 1949-08-29 | Emmett Harris | WWDLLD | Griffith Stadium, Washington | DRAW Points |
| 1949-08-15 | Page Beckwith | WLLLLL | Coliseum, Baltimore | LOST Technical knockout |