Full name: John J. Duffy
Gender: Male
Born: October 6, 1905 in Kearny, New Jersey, United States
Died: September 27, 1984 in Woburn, Massachusetts, United States
Affiliations: Independent Football Club
Country:
United States
Sport: Football
| Games | Age | City | Sport | Event | Team | NOC | Rank | Medal | |
|---|---|---|---|---|---|---|---|---|---|
| 1928 Summer | 22 | Amsterdam | Football | Men's Football | United States | USA | 9T |
| Games | Age | City | Sport | Team | NOC | Phase | Unit | Rank | Date | Result | G | YC | RC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1928 Summer | 22 | Amsterdam | Football | United States | USA | Final Standings | 9T | 1928-05-27 | 0 | 0 | 0 | ||
| 1928 Summer | 22 | Amsterdam | Football | United States | USA | Round One | Match #7 | 2 | 1928-05-29 | ARG 11, USA 2 | 0 |