Boxing great Muhammad Ali lost five times during his professional career. The boxers who beat him were Joe Frazier, Ken Norton, Leon Spinks, Larry Holmes and Trevor Berbik. Ali had a total of 56 professional wins, 37 of them by knockout.
Muhammad Ali is perhaps the greatest boxer ever to compete in the sport. Besides being the only three-time lineal World Heavyweight Champion, Ali also won the sought after Golden Gloves title and an Olympic gold medal. He was also awarded the Presidential Medal of Freedom in 2005. As of September 2014, Muhammad Ali, who suffers from Parkinson's Disease, is still married to his fourth wife and makes rare public appearances.