On January 7, 1963, Karras's ownership in Detroit's Lindell AC Bar became a source of controversy when league officials urged him to sell his financial interests in the place because of reports of gambling and organized crime influence. After first threatening to retire rather than give it up, Karras admitted placing bets on NFL games and was suspended by the league, along with Green Bay Packers' running back Paul Hornung, for one season (1963). During his exile, Karras returned to pro wrestling, taking on such memorable characters as Dick the Bruiser. He was reinstated, along with Hornung, on March 16, 1964 by NFL commissioner Pete Rozelle. Upon returning to action in 1964, Karras once refused when an official asked him to call the pregame coin toss. "I'm sorry, sir," Karras replied. "I'm not permitted to gamble." During his first year back, player discontent with head coach George Wilson resulted in Karras asking to be traded. However, the Lions settled the issue when they fired Wilson after the 1964 NFL season.