Jack O'Brien (Telegraph Hill Jack O'Brien) boxer
- bouts
- 8
- won
- 5
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- bantam
- Debut
- 1903-04-03
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1906-12-07 | Jack O'Brien | WWLLLW | Dreamland Pavilion, San Francisco | WIN Points |
| 1904-10-14 | Jack O'Brien | WWWWWL | Woodward's Pavilion, San Francisco | LOST Points |
| 1904-08-25 | Jack O'Brien | WWWWWW | Woodward's Pavilion, San Francisco | WIN KO |
| 1904-06-28 | Dick Hyland | WLLWWW | Mechanics' Pavilion Annex, San Francisco | LOST Points |
| 1904-03-04 | Jack O'Brien | WWLWWW | Mechanics' Pavilion Annex, San Francisco | LOST Points |
| 1903-04-03 | Jim Daly | LLW | Bay City A.C., San Francisco | WIN Points |