Muhammad Ali did lose in his career, his first loss was against Joe Frazier, his second loss against Ken Norton (neither of which was a knock out which still made him a good fighter). Then I believe he also lost somewhere for a third time later on, but the guy was definitely brilliant. (This was only in his professional career, he lost about 6 times in his amateur career)
It could be that there is another Malcolm X but the civil rights leader was not a boxer though he inspired Muhammad Ali he didn't go into boxing, but anyways you and I most probably are talking about different people
However Muhammad Ali was once defeated, I think it was Joe Frazier if I am not mistaken.
Malcolm X wasn't a rapper I think you are talking about cashius clay (Muhammad Ali)
Muhammad Ali is the greatest boxer, undefeated for his whole career
nawl, not him.. he was a boxer, i know it... js not well known
Julio Cesar Chavez 107 wins 86 ko's 6 defeats 2 draws
ROCKY. . . . .MALCOM X Awesome boxers lol
56w 37ko 5 defeats muhammad Ali /Cassius clay
MUHAMMAD ALI, still outstanding legend....