Muhammad Ali Clay
Inactivation
U.S.
In March 1966, Ali refused to be inducted into the armed forces. He was systematically denied a boxing license in every state and stripped of his passport. As a result, he did not fight from March 1967 to October 1970—from ages 25 to almost 29—as his case worked its way through the appeals process before his conviction was overturned in 1971.