Muhammad Ali
(born Cassius
Marcellus Clay Jr.;
January 17, 1942) is
a retired American
boxer and three-time
World Heavyweight
Champion, who is
widely considered
one of the greatest
heavyweight
championship boxers
of all time. As an
amateur, he won a
gold medal in the
light heavyweight
division at the 1960
Summer Olympics in
Rome. After turning
professional, he
went on to become
the first boxer to
win the lineal
heavyweight
championship three
times.

