MUHAMMAD ALI

At the age of 22 he won the world heavyweight championship from Sonny Liston
Nicknamed "The Greatest", and widely considered the best heavyweight of all-time. In April 1967, Ali's title would be stripped after his refusal to be drafted to Army service, resulting in his boxing license being suspended and later being sentenced to five years for evasion, which was overturned by the Supreme court. Ali was diagnosed with Parkinson's syndrome in 1984, a disease that is common to head trauma from activities such as boxing.