| Roles | Competed in Olympic Games • Competed in Intercalated Games | 
|---|---|
| Sex | Male | 
| Full name | Isidor Gadar "Jack"•Niflot | 
| Used name | Jack•Niflot | 
| Born | 16 April 1881 in ? (RUS) | 
| Died | 29 May 1950 in Long Eddy, New York (USA) | 
| Affiliations | Pastime AC, New York (USA) | 
| NOC |   United States | 
| Medals | OG | 
| Gold | 1 | 
| Silver | 0 | 
| Bronze | 0 | 
| Total | 1 | 
Jack Niflot dominated the 1904 bantamweight division and easily won the gold medal with three straight falls, throwing Gus Wester in 1:58 in the finals. Niflot was the favorite; he had won four consecutive AAU championships prior to 1904, and his Olympic title and the 1905 AAU featherweight championship gave him six straight national championships. Niflot later became a professional wrestler and when his sporting career ended, he remained in wrestling, coaching at Columbia, Princeton, and the New York Athletic Club and working as a wrestling referee.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1904 Summer Olympics | Wrestling |  USA | 
Jack Niflot | |||
| Bantamweight, Freestyle, Men (Olympic) | 1 | Gold | ||||
| 1906 Intercalated Games | Wrestling |  USA | 
Jack Niflot | |||
| Lightweight, Greco-Roman, Men (Intercalated) | =7 |