Willie O'Brien boxer
- bouts
- 10
- won
- 0
- lost
- 5
- draw
- 5
- Status
- inactive
- Division
- -
- Debut
- 1902-11-20
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1913-10-07 | Gardner Brooks | LWWWWW | Atlas A.A., Boston | LOST Points |
| 1909-03-09 | Angus McDougall | debut | Armory, Boston | LOST Points |
| 1908-11-30 | Eddie Nadeau | LDWDWD | Young Men's A.C., Salem | DRAW Points |
| 1908-10-05 | Kid Rogers | debut | Young Men's A.C., Salem | DRAW Points |
| 1908-06-01 | Young Garvan | debut | Young Men's A.C., Salem | DRAW Points |
| 1908-05-25 | Tommy Murray | DL | Temperance Hall, Salem | DRAW Points |
| 1908-03-23 | Tommy Daley | DWL | Young Men's A.C., Salem | LOST Points |
| 1907-11-28 | Young Sullivan | W | Cooper A.C., Boston | DRAW Points |
| 1905-04-10 | Young Kid Barrish | WWDLDW | Haverhill A.C., Haverhill | LOST Technical knockout |
| 1903-04-20 | Johnny Kid Sheehan | WWLDLL | Health & Physical Culture A.C., Boston | LOST Points |
| 1902-11-22 | Johnny Loftis | debut | Quaker City A.C., Philadelphia | DRAW |
| 1902-11-20 | Johnny Eden | DL | Broadway A.C., Philadelphia | WIN |
