Johnny O'Brien boxer
- bouts
- 4
- won
- 0
- lost
- 4
- draw
- 0
- Status
- inactive
- Division
- bantamweight
- Debut
- 1920-02-01
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- United Kingdom
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1923-01-08 | Teddy Baldock | WWWW | National Sporting Club, Covent Garden | LOST Technical knockout |
| 1922-06-29 | Teddy Baldock | WWW | Premierland, Whitechapel | LOST Points |
| 1922-02-16 | Teddy Baldock | WW | St Michael's Hall, Poplar | LOST Points |
| 1920-02-01 | Young Johnny Brown | debut | Hackney | LOST KO |
