The origin of professional football can be traced back to 1892, with William "Pudge" Heffelfinger's $500 contract to play in a game for the Allegheny Athletic Association against the Pittsburgh Athletic Club.
A orixe do fútbol americano profesional pode ser rastrexado até 1892, co contrato de 500 dólares dado a William "Pudge" Heffelfinger para xogar nun partido da Allegheny Athletic Association en contra do Pittsburgh Athletic Club.