Jack Brennan boxer
- bouts
- 10
- won
- 3
- lost
- 3
- draw
- 3
- Status
- inactive
- Division
- middleweight
- Debut
- 1887-12-15
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1909-11-25 | Terry Gallagher | debut | Wayne A.C., Philadelphia | LOST |
| 1905-02-02 | Jimmy Dunn | WDDLWD | Sharon | LOST KO |
| 1904-12-10 | Young Gillespie | debut | Kensington A.C., Philadelphia | LOST KO |
| 1902-04-26 | Willie Burke | debut | National A.C., Philadelphia | WIN KO |
| 1897-05-05 | Walter Hardman | DDW | Empire A.C., Syracuse | DRAW Points |
| 1897-03-20 | William Clark | L | Greenwood A.C., Brooklyn | DRAW Points |
| 1896-07-11 | Jerry Reidy | WL | Brooklyn Bridge A.C., Brooklyn | WIN |
| 1896-05-04 | George Simmerick | DW | City Line Park, Brooklyn | DRAW Points |
| 1896-03-23 | Frank Collyer | debut | South Brooklyn A.C., Brooklyn | WIN Points |
| 1892-02-27 | Charles Bull McCarthy | LWDWWW | Manhattan A.C., New York | NC No Contest |
| 1887-12-15 | Jim Daly | WWWWWW | Pittsburgh | LOST Points |