Jack O'Brien boxer
- bouts
- 20
- won
- 8
- lost
- 8
- draw
- 4
- Status
- inactive
- Division
- bantamweight
- Debut
- 1934-10-12
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- United Kingdom
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1939-05-31 | Paddy Docherty | WWWWLW | Saracen Park, Glasgow | DRAW Points |
| 1939-05-27 | Boyo Shields | debut | Portobello | WIN Points |
| 1939-05-03 | Frank McAllister | WWL | Saracen Park, Glasgow | WIN Points |
| 1939-02-18 | Jim Campbell | WLWLLW | Promenade Palace, Portobello | LOST KO |
| 1935-12-12 | Billy Sheldon | LLWWLW | Edinburgh National Sporting Club, Leith | LOST Points |
| 1935-10-18 | Jack Doyle | WLWL | Hamilton Rink, Hamilton | WIN Points |
| 1935-10-10 | Mick Young McAdam | WDLWLW | Edinburgh National Sporting Club, Leith | LOST Points |
| 1935-09-19 | Jacky Ryan | WWLWWL | Edinburgh National Sporting Club, Leith | LOST Technical knockout |
| 1935-09-05 | Jacky Ryan | WWWLWW | Edinburgh National Sporting Club, Leith | WIN Corner retirement |
| 1935-08-23 | Joe Bradley | LDWLWL | Premierland, Bridgeton | DRAW Points |
| 1935-08-06 | Jacky Ryan | WWWWWL | Parkhead Arena, Glasgow | LOST Points |
| 1935-05-03 | Tommy Berry | WLWLLL | Premierland, Bridgeton | WIN Points |
| 1935-04-26 | Johnny Schofield | LW | Premierland, Bridgeton | WIN Points |
| 1935-03-11 | George Ballantyne | LWWDLW | Premierland, Bridgeton | LOST Points |
| 1935-03-08 | KO McIntosh | L | Premierland, Bridgeton | WIN KO |
| 1935-03-04 | Frank McPherson | WLDWWW | Kelvin Hall, Glasgow | DRAW Points |
| 1935-03-01 | Johnny Burke | LW | Premierland, Bridgeton | DRAW Points |
| 1934-12-13 | Charlie Abrew | WWWLWW | Edinburgh National Sporting Club, Leith | LOST Points |
| 1934-10-26 | Peter Saunders | DLLLLL | Premierland, Bridgeton | LOST Corner retirement |
| 1934-10-12 | Jim Forbes | debut | Premierland, Bridgeton | WIN KO |
