Fighter Archie Moore, nicknamed “the Old Mongoose,” holds the record for the most career knockouts with 131. He held the light heavyweight world boxing title 1952-1959 and 1961. His record by the time he retired in 1963, around the age of 50, was 185 wins and 23 losses. His last fight that same year was a knockout win against Mike DiBiase. He died in 1998 at age 84.