The 1963 Detroit Lions season was their 30th season in Detroit and their 34th season overall. NFL Commissioner Pete Rozelle indefinitely suspended Lions Defensive Tackle Alex Karras along with Packers Halfback Paul Hornung for placing bets on NFL teams. Five other Lions players were fined $2000 each for betting on games that they did not play in. The Lions franchise was fined $2000 each on two counts for failure to report information promptly and for lack of sideline supervision.