Fat Tony

Marion Anthony "Tony" D'Amico, also known as William Williams or, more commonly, "Fat Tony", was the Capo of the Springfield Mafia. He has been behind several of Springfield's criminal enterprises. His rackets include illegal gambling, cigarette smuggling, and bootlegging. He has also been seen bribing and making secret deals with Mayor Quimby.

Fat Tony has a son named Michael, who he drives to school. He is a widower and refers to his wife's death as; "She was whacked, by natural causes." Fat Tony and his associates meet in what is known as the Legitimate Businessman's Social Club.

Fat Tony died of a heart attack after Homer betrayed him while working undercover for the FBI.