Cassius Clay

American professional boxer, born 17 January 1942 in Louisville, Kentucky USA, died 3 June 2016 in Phoenix, Arizona, USA.

An Olympic gold medalist in 1960, heavyweight World Champion from 1964-67, 1974-78, and 1978-79, he is nicknamed "The Greatest". Changed his name to [b]Muhammad Ali[/b] in the mid-1960's, when he converted to Islam.

Since his retirement from boxing he has been active in humanitarian relief and the research into Parkinson's disease, which he was diagnosed with in the 1980's.