Johnny O'Brien (Wildcat) boxer
- bouts
- 36
- won
- 10
- lost
- 18
- draw
- 8
- Status
- inactive
- Division
- middleweight
- Debut
- 1925-06-17
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1933-03-14 | Ernie Padgett | debut | Stranahan Park, Fort Lauderdale | WIN Technical knockout |
| 1931-08-31 | Bogie Saab | LWLLDL | Biscayne Arena, Miami | LOST Points |
| 1931-08-03 | Bogie Saab | LLWLLD | Biscayne Arena, Miami | WIN Points |
| 1931-07-27 | Harry Paul | WWLWWW | Biscayne Arena, Miami | DRAW Points |
| 1931-07-20 | Sid Lucas | LWWWWL | Biscayne Arena, Miami | LOST Points |
| 1931-07-13 | Billy Longo | debut | Biscayne Arena, Miami | WIN Technical knockout |
| 1931-05-15 | Sid Lucas | LDDLWW | Cinderella Ballroom, Miami | LOST Points |
| 1931-01-29 | Antonio Dominguez | WDLWWL | Coliseum, Coral Gables | LOST Points |
| 1930-08-08 | Buster Price | WLWWWW | Salem Arena, Salem | LOST KO |
| 1929-09-06 | Tommy Lannon | WWWLWW | North Street Rink, Salem | LOST |
| 1929-07-04 | Joe Cortez | LWLWLL | Lincoln Field, Twin Falls | LOST Points |
| 1929-05-28 | Clyde Headricks | DWLLWL | Butte | LOST KO |
| 1929-04-20 | Ray Peterson | WWWLDD | Legion Club, Downey | WIN Technical knockout |
| 1929-04-15 | Hal Hoxwood | WLWLLW | Legion Club, Rexburg | WIN Points |
| 1929-04-08 | Ray Peterson | WWWLD | Gray's Opera House, Saint Anthony | DRAW Points |
| 1929-02-11 | Billy Rogers | DWWLWW | Hippodrome Theater, Salt Lake City | DRAW Points |
| 1928-08-22 | Johnny Hanna | WWLWLL | Odeon Hall, Idaho Falls | LOST Points |
| 1928-02-23 | Willard Dix | WWWWWW | Mount Vernon | DRAW Points |
| 1928-02-01 | Battling Slim Ryan | WWWWWW | Liberty Hall, Bellingham | DRAW Points |
| 1927-07-20 | Johnny Priston | WLWWDD | National Hall, San Francisco | LOST Points |
| 1926-08-26 | Ed Shepard | DDLWDL | Fairgrounds, Gannett | DRAW Points |
| 1926-04-08 | Jimmy Marcus | LDWWLD | Rialto Theatre, Reno | LOST Points |
| 1926-03-23 | Charles Mitchell | debut | Four-L Club, Coeur d'Alene | WIN Points |
| 1926-03-08 | Herman Auerbach | WLLDWW | Hippodrome Theater, Salt Lake City | LOST Points |
| 1926-02-01 | Wesley Ketchell | DWWWDL | Hippodrome Theater, Salt Lake City | DRAW Points |
| 1926-01-25 | Herman Auerbach | WWLLWL | Hippodrome Theater, Salt Lake City | WIN Points |
| 1926-01-04 | Imey Garfinkle | WDLDDD | Hippodrome Theater, Salt Lake City | WIN |
| 1925-12-14 | Wild Bill Farrell | WDLDWW | Hippodrome Theater, Salt Lake City | LOST Points |
| 1925-11-30 | Pat Gilbert | DLWDDL | Manhattan A.C., Salt Lake City | WIN KO |
| 1925-11-18 | Earl Compagna | debut | Chamber of Commerce Hall, Wenatchee | LOST Technical knockout |
| 1925-11-16 | Nobe Cervantes | LLDLWD | Salt Lake City | DRAW Points |
| 1925-11-09 | Wild Bill Farrell | DWDLDW | Salt Lake City | LOST Points |
| 1925-10-12 | Art Earl | debut | Salt Lake City | WIN Technical knockout |
| 1925-09-28 | Herman Auerbach | DLWWLL | Salt Lake City | LOST Points |
| 1925-07-16 | Clyde Hull | LDDWWW | American Legion, Milbank | LOST Points |
| 1925-06-17 | Benny Flint | WWLW | Memorial Hall, Iola | LOST KO |
