John Fahay is a former player in the National Football League. He was a member of the Milwaukee Badgers during the 1925 NFL season before playing the following season with the Racine Tornadoes during the 1926 NFL season. That same year he was also a member of the Chicago Bulls of the American Football League. After two years away from professional football, he played with the Minneapolis Red Jackets during the 1929 NFL season.