Muhammad Ali was born Cassius Clay in Louisville, Kentucky. He started fighting at the age of 12 after his bicycle was stolen.In 1960, Clay won a gold medal in the Olympics at Rome, Italy.He had the nickname “The Louisville Lip” for statements such as “I am the Greatest,” and “I’m young, I’m pretty, I’m fast, and no one can beat me.” From 1960-1963, Cassius Clay was 19-0 with 15 knockouts. On February 25, 1964, Clay defeated Sonny Liston and won the World Heavyweight Championship. He cemented his title as “The Greatest” by outdueling George Foreman in 1974 in “The Rumble in the Jungle”. In 1975, Ali defeated Joe Frazier in “The Thrilla in Manila”. In one of the best fights in boxing history, Ali won by TKO after the 14th round. In 1981, Ali retired with a career record of 56-5, with 37 knockouts.