Jack O'Brien boxer
- bouts
- 8
- won
- 1
- lost
- 6
- draw
- 1
- Status
- inactive
- Division
- lightweight
- Debut
- 1907-06-03
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Australia
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1916-06-24 | Puck Evans | WLD | Brisbane Stadium, Brisbane | LOST Points |
| 1915-06-28 | Arthur Woolfe | D | Olympia A.C. Newtown, Sydney | LOST Points |
| 1914-11-21 | Jack Lewis | WLWWLL | Sydney Stadium, Sydney | WIN Points |
| 1914-01-07 | Nugget Winters | WDWLLL | Baker's Stadium, Brisbane | LOST Points |
| 1913-12-20 | Mick Scott | debut | Baker's Stadium, Brisbane | DRAW Points |
| 1912-11-30 | Paddy Sheehan | W | Alhambra Hall, Nambour | LOST KO |
| 1911-07-01 | Ted Robbie | LDLLLW | Starr Stadium, Wollongong | LOST KO |
| 1907-06-03 | Pinky Williams | debut | Athletic Pavilion, Melbourne | LOST Technical knockout |