What boxer holds the record for career knockouts and had one of the longest careers in the sport?

Player #4752022, What an honor that must have been! Brings to mind the first barber shop scene in the movie "Coming To America", with Eddie Murphy & Arsenio Hall. They were arguing who they thought was the greatest boxer of all time. Hilarious comedy!

Actually had a chance to meet him. A true gentleman as well as a great champion.