Mike Tyson is arguably the most polarizing sports figure of the last 25 years. He's been retired since 2005 and his last noteworthy bout—a heavyweight title match against Lennox Lewis—was way back in 2002. Despite these facts, Iron Mike remains one of the most recognizable figures in boxing and pop culture. His highlights include becoming the youngest heavyweight champion in boxing history at the age of 20, 44 career knockouts, and a pop culture rebirth in recent years with roles in The Hangover, The Hangover Part II, and his one-man show Mike Tyson: Undisputed Truth.