Cassius Clay, 1960: he (allegedly) threw his gold medal into the river.
George Foreman, 1968: he captured the heart of a nation by waving a tiny American flag.
Sugar Ray Leonard, 1976: he taped a photo of his girlfriend to his sock.
Oscar De La Hoya, 1992: he dedicated his Olympic triumph to his late mother.
Joe Frazier, 1964: he fought with a broken thumb.