Jack Duffy boxer
- bouts
- 25
- won
- 11
- lost
- 13
- draw
- 1
- Status
- inactive
- Division
- middleweight
- Debut
- 1915-12-17
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1926-08-06 | Dick Watson | WWWL | Coliseum, Chicago | LOST Points |
| 1925-02-27 | Billy Ehmke | WLDWWD | Auditorium, Milwaukee | LOST KO |
| 1924-09-12 | Harry Ethrington | LD | Sager's Arena, Aurora | WIN |
| 1924-03-17 | Joey Clein | WWWWDD | Janesville | LOST |
| 1924-03-13 | Earl Blue | WWWWW | Auditorium, Cedar Rapids | LOST |
| 1923-09-27 | Jackie Clark | LDDDWL | Sportland Heights Arena, Berwyn | LOST Points |
| 1923-03-07 | Gunner Joe Quinn | LDWWWW | Armory G, Appleton | LOST Technical knockout |
| 1923-02-27 | Anthony Downey | WWWWLW | Columbus | LOST Points |
| 1923-02-15 | Billy Wolpin | LWDLW | Armory G, Appleton | LOST |
| 1923-01-15 | Jackie Clark | LWWWWW | Shenandoah | DRAW |
| 1923-01-01 | Jackie Clark | LLLWWW | Allentown | LOST |
| 1922-12-23 | Jack Bailey | LLWWDW | Big Chief A.C., Chicago | LOST Points |
| 1922-11-24 | Jock Malone | WLWWW | Malachy A.C., Chicago | LOST KO |
| 1922-06-29 | Al Shubert | LWLDWW | Roseland | WIN KO |
| 1922-02-02 | Billy Goat Doig | WLLWWL | La Salle | LOST |
| 1921-10-28 | Joe Vareick | LWLDW | Kenosha | DRAW |
| 1921-10-19 | Joe Martin | LLWL | Racine | WIN KO |
| 1921-06-27 | Frank Carbone | WLWLLL | Tulane Arena, New Orleans | LOST Technical knockout |
| 1921-05-27 | Al McCue | debut | Kenosha | WIN KO |
| 1921-04-11 | Walter Laurette | LWWLDL | Auditorium, Freeport | DRAW Points |
| 1921-01-29 | George Chip | LLDLDL | Commonwealth Sporting Club, New York | LOST KO |
| 1920-12-11 | Harry Greb | WWWWWW | Motor Square Garden, Pittsburgh | LOST Technical knockout |
| 1920-09-11 | Spike Sullivan | WWWWWW | Oswego Arena, East Chicago | WIN KO |
| 1920-04-22 | Jock Malone | WDWLL | Empire Theatre, Rock Island | LOST |
| 1919-10-10 | Mike Hirsch | DLLLDD | Auditorium, Cedar Rapids | DRAW |
| 1919-03-31 | Stockyards Tommy Murphy | WLWWDW | Waterloo Theatre, Waterloo | LOST |
| 1919-03-17 | Jack Hughes | LLL | Waterloo Theatre, Waterloo | WIN KO |
| 1919-02-28 | Billy Ehmke | WWLLWW | Waterloo Theatre, Waterloo | WIN Technical knockout |
| 1919-02-14 | Stockyards Tommy Murphy | DWLWWL | Auditorium, Cedar Rapids | LOST |
| 1918-10-04 | Jack Dillon | WDDDWW | Auditorium, Cedar Rapids | LOST |
| 1918-09-02 | Joe Herrick | LLLWWL | Auditorium, Cedar Rapids | LOST |
| 1918-06-25 | Fred Bowen | debut | Lakeside Arena, Racine | WIN KO |
| 1917-06-08 | Joe O'Brien | DWWLLD | Lakeside Auditorium, Racine | LOST Technical knockout |
| 1916-10-27 | Lee Barrett | WWLLLL | Racine | LOST |
| 1916-09-04 | Spike Kelly | DWWWDW | Racine | LOST |
| 1916-03-10 | Jimmy Peterson | L | Racine | WIN KO |
| 1916-01-27 | Eddie Moha | WWWLWW | Colonial Theater, Waukesha | LOST |
| 1916-01-20 | Jimmy Peterson | debut | Racine | WIN KO |
| 1916-01-01 | KO Hubert | debut | Racine | WIN Technical knockout |
| 1915-12-21 | Eddie Moha | LWWWLW | Auditorium, Milwaukee | LOST |
| 1915-12-17 | Arthur Ehrling | LLWDDD | Racine | WIN KO |