![Muhammad Ali (born Cassius Clay, Jr.; January 17, 1942) American former professional boxer, considered among the greatest heavyweights in the sport's history. May 25, 1965, heavyweight champion Muhammad Ali after his rematch Muhammad Ali (born Cassius Clay, Jr.; January 17, 1942) American former professional boxer, considered among the greatest heavyweights in the sport's history. May 25, 1965, heavyweight champion Muhammad Ali after his rematch](https://c8.alamy.com/comp/P652CH/muhammad-ali-born-cassius-clay-jr-january-17-1942-american-former-professional-boxer-considered-among-the-greatest-heavyweights-in-the-sports-history-may-25-1965-heavyweight-champion-muhammad-ali-after-his-rematch-with-boxer-sonny-liston-ali-knocked-out-liston-in-the-first-round-P652CH.jpg)
Muhammad Ali (born Cassius Clay, Jr.; January 17, 1942) American former professional boxer, considered among the greatest heavyweights in the sport's history. May 25, 1965, heavyweight champion Muhammad Ali after his rematch
![On This Day: Muhammad Ali became the first man to win the heavyweight title three times | Boxing News On This Day: Muhammad Ali became the first man to win the heavyweight title three times | Boxing News](https://www.boxingnewsonline.net/wp-content/uploads/sites/17/2019/03/muhammad-ali.jpg)
On This Day: Muhammad Ali became the first man to win the heavyweight title three times | Boxing News
![Muhammad Ali, world heavyweight boxing champion, in his gym with Johnny Coulon, the world bantamweight champion of 1910. Chicago, Illinois, 1966 | Magnum Photos Store Muhammad Ali, world heavyweight boxing champion, in his gym with Johnny Coulon, the world bantamweight champion of 1910. Chicago, Illinois, 1966 | Magnum Photos Store](https://content.magnumphotos.com/shop/wp-content/uploads/2021/01/HOT-NYC16015-MAIN.jpg)