Jonathan O'Brien boxer
- bouts
- 12
- won
- 9
- lost
- 2
- draw
- 1
- Status
- inactive
- Division
- super middleweight
- Debut
- 1998-05-18
- Height
- 6′ 0″/183cm
- Reach
- -
- Age
- -
- Born
- 1978-05-09
- Death
- -
- Nationality
- Ireland
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2008-07-05 | Anghel Florin | W | National Basketball Arena, Dublin | WIN Corner retirement |
| 2008-04-19 | Moses Matovu | LLLLLL | National Stadium, Dublin | WIN Points |
| 2008-03-15 | Salah Zabian | LLWLLL | Orpheum Theater, Boston | WIN Technical knockout |
| 2008-01-26 | Paul Bonson | DLLLLL | Neptune Sports Arena, Cork | WIN Points |
| 2006-02-18 | Peter Zsilak | LWWWLW | Sheriff Youth Centre, Dublin | WIN Technical knockout |
| 2005-09-17 | Imrich Borka | LLLLLL | National Stadium, Dublin | WIN Technical knockout |
| 2001-11-16 | Simeon Cover | LWLL | National Stadium, Dublin | WIN Points |
| 2001-03-22 | Willis Lockett | debut | Michael's Eighth Avenue, Glen Burnie | LOST KO |
| 1999-06-19 | Pedro Carragher | LLLLLL | National Stadium, Dublin | DRAW Points |
| 1999-03-19 | Sean Pritchard | LL | Winter Gardens, Weston-super-Mare | LOST Points |
| 1998-09-19 | Sean Pritchard | debut | National Basketball Arena, Dublin | WIN Points |
| 1998-05-18 | Michael Pinnock | DLLLLL | Winter Gardens, Cleethorpes | WIN Points |