Johnny O'Brien boxer
- bouts
- 7
- won
- 1
- lost
- 5
- draw
- 1
- Status
- inactive
- Division
- lightweight
- Debut
- 1916-04-06
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1921-01-04 | Young Donahue | LWWWWL | Mechanics Building, Boston | LOST Points |
| 1920-09-21 | Tommy Nee | WWLLDW | Mechanics Building, Boston | LOST Points |
| 1918-12-23 | Young Marka | debut | Central A.C., Boston | LOST Points |
| 1916-08-08 | Al Gerard | LW | Armory A.A., Boston | LOST KO |
| 1916-08-04 | J. Campi | debut | Commercial A.C., Boston | WIN Points |
| 1916-07-21 | Louis Leonard | debut | Commercial A.C., Boston | DRAW Points |
| 1916-04-06 | Teddy Murphy | WWLWWW | Academy of Music, Lowell | LOST Points |
