Ali, Muhammad
Ali, Muhammad, former name Cassius Clay (1942- ), US boxer. He won the Olympic light-heavyweight gold medal in 1960 and is the only man to have won the world heavyweight championship three times (1964, 1974, 1978). In 1967, having become a Black Muslim and changed his name, he was deprived of his title and forbidden to box for three years for refusing to serve in the US Army on religious grounds. With his slogan “I’m the greatest”, he became well known for his flamboyant and colourful style. He now suffers from. Parkinson’s disease as a result of blows to the head.