From then on, he went undefeated until 1985, when he lost his title to Leon Spinks. After that loss, he retired from boxing.
Tyson has earned $100 million dollars throughout his career. He has also earned millions through endorsements. He has a net worth of about $300 million.
Mike Tyson's first professional boxing match was against Trevor Berbick at Madison Square Garden in New York City on March 11th 1986.