Cyclone Jack O'Brien boxer
- bouts
- 3
- won
- 2
- lost
- 1
- draw
- 0
- Status
- inactive
- Division
- -
- Debut
- 1899-01-07
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1902-11-03 | Charley Mulhall | LLWWDW | Washington S.C., Philadelphia | LOST |
| 1902-10-24 | Tommy Wallace | LLWWWL | Ariel A.C., Philadelphia | LOST |
| 1902-10-03 | Joe Lavoie | LWDWW | Ariel A.C., Philadelphia | WIN |
| 1902-06-19 | George Krall | WWWWWL | Broadway A.C., Philadelphia | LOST |
| 1902-01-10 | Young Riley | WLDLWW | Industrial Hall, Philadelphia | WIN |
| 1900-06-08 | Charley Dowling | LLDLDL | Central A.C., Philadelphia | LOST |
| 1900-03-09 | Gus Gardner | WLWWWW | Industrial Hall, Philadelphia | DRAW |
| 1900-03-05 | Fish Ferris | LWLLLD | Tuxedo A.C., Philadelphia | WIN |
| 1900-01-20 | Johnny Woolem | DLDLWD | Nonpareil A.C., Philadelphia | DRAW |
| 1899-12-26 | Kentucky Rosebud | LDDDLW | Broadway A.C., Philadelphia | DRAW |
| 1899-08-18 | John Henry Johnson | WDDWWW | Quaker City A.C., Philadelphia | LOST |
| 1899-07-10 | Harry Smith | DDWLLL | Broadway A.C., Philadelphia | WIN KO |
| 1899-07-03 | Kentucky Rosebud | LWLDLL | Broadway A.C., Philadelphia | DRAW |
| 1899-04-24 | Billy Farren | DLWLLL | Broadway A.C., Philadelphia | DRAW |
| 1899-01-30 | Whitey Lester | L | Arena A.C., Philadelphia | LOST Points |
| 1899-01-21 | Johnny Woolem | DLDL | Nonpareil A.C., Philadelphia | LOST |
| 1899-01-10 | Young Mitchell | debut | Nonpareil A.C., Philadelphia | WIN |
| 1899-01-07 | Tommy Kelly | debut | Nonpareil A.C., Philadelphia | WIN KO |