Cassius Clay

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ADVANCE FOR USE SUNDAY, FEB. 23, 2014 AND THEREAFTER - FILE - In this Feb. 18, 1964 file photo, Cassius Clay poses with The Beatles, from left, Paul McCartney, John Lennon, George Harrison and Ringo Starr while visiting the heavyweight boxing contender at his training camp in Miami Beach, Fla. A few days earlier the group had appeared for the first time on the Ed Sullivan Show. A week later, Clay would beat Sonny Liston and go on to even greater things as Muhammad Ali. (AP Photo)

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Two year old Shelley Obermuller tugs for the attention of Cassius Clay as the world heavyweight champion gives autographs to admirers during a training session in London, England, May 17, 1966. Clay, who calls himself Muhammad Ali, will defend his title against British heavyweight king Henry Cooper when they meet in the British capital in a title bout May 21. (AP Photo)

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Cassius Clay is a happy young man in his dressing room after knocking out Archie Moore in the exact round he predicted he would, the fourth, at Los Angeles, Nov. 17, 1962. (AP Photo)

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Cassius Clay's handlers hold him back as he reacts after he is announced the new heavyweight champion of the world on a seventh round technical knockout against Sonny Liston at Convention Hall in Miami Beach, Fla., on Feb. 25, 1964. (AP Photo)

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FILE - In this Feb. 18, 1964, file photo, The Beatles, from left, Paul McCartney, John Lennon, Ringo Starr, and George Harrison, take a fake blow from Cassius Clay, who later changed his name to Muhammad Ali, while visiting the heavyweight contender at his training camp in Miami Beach, Fla. Ali turns 70 on Jan. 17, 2012. (AP Photo/File)

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Young boxer Cassius Clay is seen with his mother, Odessa Grady Clay, April 2, 1963, at an unknown location. (AP Photo)

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Victorious Muhammad Ali (Cassius Clay) holds up three fingers and a fist in his dressing room in Pittsburgh, on Jan. 25, 1963, following his three-round knockout of Charley Powell. Clay had predicted he would whip Powell in three in the Pittsburgh bout. (AP Photo)

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Heavyweight boxer Cassius Clay predicts the round his bout with Charley Powell will end, while relaxing in his hotel room in Pittsburgh, Jan. 17, 1963. (AP Photo)

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Young heavyweight boxer Cassius Clay points to a sign he wrote on a chalk board in his dressing room before his fight against Archie Moore in Los Angeles, Nov. 15, 1962, predicting he'd knock Moore out in the fourth round, which he went on to do. The sign also predicts Clay will be the next champ via a knockout over Sonny Liston in eight rounds. Photo was made after the Clay-Moore fight. (AP Photo/Harold P. Matosian)

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Cassius Clay, 18-year-old from Louisville, Ky., throws a right at Tony Madigan of Australia, left, during the light heavyweight boxing semi-finals at the Summer Olympic Games in Rome, Italy, Sept. 3, 1960. Clay won the bout with all five votes of the judges. (AP Photo)