Philip Michael Leonetti (born March 27, 1953) is an American mobster and author who became the underboss of the Philadelphia crime family under his mentor, uncle and former boss, Nicodemo "Little Nicky" Scarfo, before becoming a government informant in 1989 while facing a lengthy sentence of 45 years for racketeering.
At the time, he was the highest-ranking member of the American Mafia to break his blood oath and turn informer.