Young Jack O'Brien boxer
- bouts
- 19
- won
- 8
- lost
- 8
- draw
- 2
- Status
- inactive
- Division
- lightweight
- Debut
- 1907-12-10
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1914-04-06 | Jimmy Jordan | D | Rankin | DRAW |
| 1914-02-28 | Hugh Madole | DDLWLW | Sandy Creek | DRAW |
| 1912-09-24 | Bud Brown | LLLDWL | Southside Market House, Pittsburgh | WIN |
| 1912-09-14 | Pierce Matthews | WDWWWW | Old City Hall, Pittsburgh | WIN |
| 1912-09-12 | Kid Hogan | WW | East Liberty Hunting and Fishing Club, Pittsburgh | LOST |
| 1912-03-23 | Young Goldie | DDDWWW | Old City Hall, Pittsburgh | LOST |
| 1911-12-23 | Mickey Rodgers | WWWWWW | Old City Hall, Pittsburgh | DRAW |
| 1911-12-16 | Joe Clark | DDLWWW | Old City Hall, Pittsburgh | LOST |
| 1911-12-02 | Young Morgan | WLWLDL | Old City Hall, Pittsburgh | WIN |
| 1911-11-29 | Kid Taylor | DDDDWD | Youngstown | WIN |
| 1911-10-28 | Matty McAuliffe | WWDDLL | Old City Hall, Pittsburgh | WIN |
| 1911-05-26 | Young Battling Kelly | LLDDWL | Monumental Theater, Baltimore | DRAW Points |
| 1911-04-22 | Tommy Lowe | WWWLDW | Duquesne Gardens, Pittsburgh | LOST KO |
| 1911-03-28 | Mickey Farrell | LWWW | Youngstown | WIN |
| 1911-03-11 | Tony Pastorius | DLDLLW | Tarentum | WIN |
| 1911-02-08 | Bud Brown | LWWD | Rankin | WIN |
| 1911-02-07 | Young Frank Erne | W | Tarentum | DRAW |
| 1911-01-29 | Kid Williams | debut | Youngstown | DRAW |
| 1911-01-23 | Joe Getz | DLLDWL | Labor Temple, Pittsburgh | DRAW |
| 1911-01-09 | Jim McPollard | debut | Labor Temple, Pittsburgh | LOST |
| 1910-11-28 | Harry Pease | L | Waldemeier Hall, Pittsburgh | WIN Technical knockout |
| 1910-11-15 | Joe Clark | DDWWWL | Labor Temple, Pittsburgh | WIN |
| 1910-11-01 | George KO Chaney | WWW | Princess Theater, Baltimore | LOST Technical knockout |
| 1910-10-29 | Tommy O'Toole | LDLWLW | Central A.C., Philadelphia | LOST |
| 1910-10-15 | Yankee Schwartz | WLWDWW | National A.C., Philadelphia | LOST |
| 1910-10-11 | Shep Farren | WDWWLL | Albaugh Theater, Baltimore | LOST Points |
| 1910-09-28 | Buck Brown | DDDLLW | Duquesne Gardens, Pittsburgh | WIN |
| 1910-09-26 | Joe Clark | DD | Miller's Hall, East Pittsburgh | DRAW |
| 1910-09-13 | Young Eppy | DDWWDW | Labor Temple, Pittsburgh | LOST |
| 1910-09-12 | Tom Anderson | debut | Waldemeier Hall, Pittsburgh | WIN KO |
| 1910-09-09 | Bud Brown | debut | Miller's Hall, Pittsburgh | WIN |
| 1910-09-05 | Joe 'Buck' Kelly | LLDLWW | Albaugh Theater, Baltimore | DRAW Points |
| 1910-08-15 | Kid Hogan | WLDDDW | Ford City | LOST |
| 1910-07-07 | Young Bijou | DWDDWL | Hunting and Fishing Club, Liberty | DRAW |
| 1910-05-16 | Joe Getz | WLWDWW | Greensburg | DRAW |
| 1910-03-24 | Jack Watkins | debut | Irwin | WIN KO |
| 1910-02-17 | Joe Getz | WDDWWL | Greensburg | DRAW |
| 1910-02-10 | James Sharkey | debut | Turner Hall, Pittsburgh | WIN Technical knockout |
| 1909-12-28 | Jimmy Barrett | debut | Greenfield Hall, Pittsburgh | WIN KO |
| 1909-12-21 | Kid Taylor | LLLDL | Old City Hall, Pittsburgh | LOST KO |
| 1909-11-22 | Joe Getz | LWWDLW | Cambria Theatre, Johnstown | WIN |
| 1909-10-22 | Kid Coleman | L | Duquesne Gardens, Pittsburgh | WIN |
| 1909-10-18 | Patsy Hayden | DLWWLL | Johnstown | DRAW |
| 1909-09-20 | Joe Getz | WDWDLW | Keystone Hall, Madison | LOST |
| 1909-09-17 | Johnny Whittaker | LWLWLL | Duquesne Gardens, Pittsburgh | WIN |
| 1909-06-15 | Leo McAuliffe | debut | Duquesne Gardens, Pittsburgh | WIN |
| 1909-06-09 | Jack Chaney | debut | Monumental Theater, Baltimore | LOST Points |
| 1909-06-07 | Bud Weston | LLDD | Oakland Natatorium, Pittsburgh | WIN |
| 1909-05-18 | George Blackhall | WDDLDD | Duquesne Gardens, Pittsburgh | WIN |
| 1909-04-17 | Young Jimmy Britt | WWWWLW | Wilkinsburg | DRAW |
| 1909-04-16 | Bud Weston | LL | Duquesne Gardens, Pittsburgh | DRAW |
| 1909-03-23 | George Blackhall | DWDDLD | Sterling A.C ., Pittsburgh | DRAW |
| 1909-03-02 | Young Joe Grim | DDWDWW | Hiland Theater, Pittsburgh | NC No Contest |
| 1909-02-26 | George Blackhall | DDWDDL | Sterling A.C ., Pittsburgh | DRAW |
| 1909-02-24 | Matty McAuliffe | WLDLWL | Duquesne Gardens, Pittsburgh | DRAW |
| 1909-02-17 | Kid Taylor | LL | Duquesne Gardens, Pittsburgh | WIN |
| 1909-02-02 | Harry Brown | LLDLLW | Hiland Theater, Pittsburgh | WIN Technical knockout |
| 1909-01-26 | Matty McAuliffe | WLD | Hiland Theater, Pittsburgh | WIN Technical knockout |
| 1908-12-17 | Harry Brown | LWLLDL | Continental A.C., Pittsburgh | WIN |
| 1908-11-27 | Jack Bradley | debut | Youngstown | WIN Points |
| 1908-11-25 | Matty McAuliffe | debut | Nonpareil A.C., Pittsburgh | LOST Technical knockout |
| 1908-10-22 | Kid Hogan | W | Southside Market House, Pittsburgh | LOST |
| 1908-10-02 | Young Ziringer | WWDDDL | Old City Hall, Pittsburgh | LOST |
| 1908-08-31 | Young Ziringer | WLWWDD | Greensburg | DRAW |
| 1907-12-10 | Mike O'Toole | L | Rankin Athletic Club Rooms, Rankin | LOST |