Dennis O'Brien boxer
- bouts
- 20
- won
- 12
- lost
- 7
- draw
- 1
- Status
- inactive
- Division
- middleweight
- Debut
- 1983-09-08
- Height
- 6′ 0″/183cm
- Reach
- -
- Age
- -
- Born
- 1964-05-15
- Death
- -
- Nationality
- United Kingdom
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1987-06-03 | Paul Smith | DLWLWW | Elephant & Castle Centre, Southwark | LOST Technical knockout |
| 1987-02-20 | Seamus Casey | WLDLWL | Magnet Leisure Centre, Maidenhead | WIN Points |
| 1986-09-01 | Karl Barwise | LLWLWL | Norrthern Sports Centre, Ealing | LOST Technical knockout |
| 1985-10-25 | Graeme Ahmed | LLWWLW | West Hotel, Fulham | LOST Corner retirement |
| 1985-09-20 | Randy Henderson | LLLLLW | Crest Hotel, Longford | WIN Points |
| 1985-07-22 | Alan Baptiste | DWLWDL | Crest Hotel, Longford | LOST Points |
| 1985-04-26 | John Ridgman | WLWWLW | Crest Hotel, Longford | DRAW Points |
| 1985-03-23 | Danny Sullivan | WWWWWL | Lyceum Ballroom, The Strand | WIN Technical knockout |
| 1985-03-01 | Joe Lynch | LLLLLL | Crest Hotel, Longford | WIN Technical knockout |
| 1985-02-05 | Mark Mills | WLLWL | Town Hall, Battersea | LOST Points |
| 1984-11-30 | Randy Henderson | LLWLLL | Crest Hotel, Longford | WIN Points |
| 1984-10-23 | Louis Johnson | LL | Town Hall, Battersea | WIN |
| 1984-09-28 | Seamus Casey | LLLW | Crest Hotel, Longford | WIN Points |
| 1984-03-27 | Phil O'Hare | LWLLWL | Town Hall, Battersea | LOST Points |
| 1984-02-06 | Tony Kempson | WLL | Marriott Hotel, Mayfair | WIN Technical knockout |
| 1984-01-27 | Phil O'Hare | LWLWLL | Crest Hotel, Longford | LOST Points |
| 1983-12-01 | Louis Johnson | debut | Festival Hall, Basildon | WIN Technical knockout |
| 1983-11-09 | Bobby Rimmer | LWWWWW | 20th Century SC,Cliffs Pavilion, Southend | WIN Technical knockout |
| 1983-09-23 | Tony Baker | LLW | Crest Hotel, Longford | WIN Technical knockout |
| 1983-09-08 | Kevin Webb | LWWWWL | Porchester Hall, Queensway | WIN KO |