Muhammad Ali /ɑːˈliː/; (born Cassius Marcellus Clay Jr.; January 17, 1942 – June 3, 2016) was an American professional boxer, widely regarded as one of the most significant and celebrated sports figures of the 20th century. From early in his career, Ali was known as an inspiring, controversial and polarizing figure both inside and outside the ring.
Clay was born in Louisville, Kentucky, and began training when he was 12 years old. At 22, he won the world heavyweight championship from Sonny Liston in an upset in 1964. Shortly after that, Clay converted to Islam, changed his "slave" name to Ali, and gave a message of racial pride for African Americans and resistance to white domination during the 1960s Civil Rights Movement.(Wikipedia)
May he rest in peace!