Marty O'Brien (Anthony Martin Sinatra) boxer
- bouts
- 6
- won
- 1
- lost
- 5
- draw
- 0
- Status
- inactive
- Division
- bantamweight
- Debut
- 1911-01-06
- Height
- -
- Reach
- -
- Age
- 74
- Born
- 1894-05-04
- Death
- 1969-01-24
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1921-06-06 | Johnny Dohan | WLLLDW | Ridgewood Grove, Brooklyn | LOST KO |
| 1920-04-30 | Sailor Burke | debut | Jersey City | LOST |
| 1914-01-17 | Young Sieger | LLLLW | Brown's Gym, New York | WIN |
| 1914-01-03 | Young Sieger | LLLLL | Brown's Gym, New York | LOST Technical knockout |
| 1912-04-27 | Mike Rosen | D | St. Nicholas Arena, New York | LOST |
| 1911-07-05 | Mike Cashman | debut | Long Acre A.A., New York | LOST KO |
| 1911-02-20 | Hugh Ross | WWWWLL | Alhambra, Syracuse | LOST KO |
| 1911-01-06 | Bull Anderson | DLLW | Bedford A.C., Brooklyn | LOST KO |