High Quality Content by WIKIPEDIA articles! Marion Anthony "Fat Tony" D`Amico is a recurring character in the animated sitcom The Simpsons. He is voiced by Joe Mantegna and first appeared in the third season episode "Bart the Murderer". Fat Tony is a gangster and the underboss of the Springfield Mafia and his henchmen include Legs, Louie and Johnny Tightlips, and he answers to Don Vittorio DiMaggio.