(1942-), US boxer; born Cassius Marcellus Clay. He won the world heavyweight title in 1964, 1974, and 1978, becoming the only boxer to be world heavyweight champion three times. After converting to Islam and changing his name, he was stripped of his title for refusing army service on conscientious objector grounds. This decision was overturned by the US Supreme Court in 1976, and his title was reinstated.
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