John Crncich was a Grey Cup champion Canadian Football League player. He played offensive center. A native Croatian, Crncich played football with Thomas D'Arcy McGee High School, and later attended McGill University, both in Montreal. He won the Grey Cup with the champion St. Hyacinthe-Donnacona Navy team in 1944. He was a player with the Montreal Hornets and in 1946 played one game with the Toronto Argonauts. He finished his football career playing 2 seasons for the Sarnia Imperials.