Billy O'Leary boxer
- bouts
- 20
- won
- 11
- lost
- 9
- draw
- 0
- Status
- inactive
- Division
- middleweight
- Debut
- 1920-06-12
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1935-04-02 | Paul Junior | WWWWWW | Springvale | LOST |
| 1930-08-05 | Paul Junior | DWDLWW | Portland | LOST KO |
| 1930-05-12 | Jackie Norton | WWLWWL | Mechanics Building, Boston | LOST Points |
| 1930-03-27 | Dominick Mastriano | LLWWLL | Rutland | LOST Technical knockout |
| 1930-03-10 | Young Lefty | LWLWWW | Casino, Fall River | LOST Points |
| 1929-09-10 | Freddie Bender | LLLWDW | Mark's Stadium, Tiverton | LOST |
| 1929-07-16 | Lou Petrone | WWWWLW | Exposition Building, Portland | WIN Technical knockout |
| 1929-03-22 | Hy Diamond | WLWLWW | Boston Garden, Boston | LOST Points |
| 1929-01-25 | Tommy Harper | WLWLLW | Boston Garden, Boston | WIN Points |
| 1928-12-21 | George Russo | debut | Mechanics Hall, Worcester | WIN Points |
| 1928-09-21 | Tommy Harper | WWW | Braves Field, Boston | LOST Points |
| 1928-06-26 | Dick Howell | LWWLWW | Exposition Building, Portland | DRAW |
| 1928-06-18 | Barney Sweeney | WLLLLW | Braves Field, Boston | WIN Points |
| 1928-04-20 | Joe Pahn | debut | Mechanics Building, Boston | LOST Points |
| 1928-04-02 | Charlie Parker | DWLDLW | Arena, Boston | WIN Points |
| 1928-03-26 | Tony Magna | WWLLLL | Newburyport | WIN Technical knockout |
| 1928-03-05 | Tony Magna | LWWLLL | Mechanics Building, Boston | WIN Points |
| 1928-02-13 | Milton Eckstein | WWWDL | Arena, Boston | WIN Points |
| 1927-04-05 | Kentucky Ferguson | WDWWWW | Exposition Building, Portland | WIN KO |
| 1926-01-08 | Kentucky Ferguson | WWWWWW | Portland | WIN KO |
| 1924-01-07 | Young Arnold | debut | Lynn | LOST Points |
| 1920-06-12 | Soldier Wells | debut | Skating Rink, Colon | WIN Technical knockout |
