Lefty Ruggiero (born Benjamin Ruggiero; April 19, 1926 – November 24, 1994 was an American mobster in the Bonanno crime family. He is well known for his friendship and mentorship of FBI undercover agent Joseph D. Pistone. When Pistone's operation was ended on July 26, 1981, the FBI intercepted and arrested Ruggiero on August 29, 1981. In November 1982, Ruggiero was sentenced to 15 years in prison for racketeering conspiracy; he was released in April 1993 before his death from cancer.
