What were the best KOs in boxing history? One of them, and one of my personal favorites, is SRR's KO of Fullmer in their rematch.
Certainly amongst the Cleanest - Recent Vintage Jackson Vs Graham Bob Foster Vs Mike Quarry (Best for whom ??) Martinez Vs Williams Shavers Vs Ellis Arguello Vs Escalera Ray Leonard Vs Dave Boy Green Walcott Vs Charles Marciano Vs Walcott
Nunn vs Kalambay is the cleanest I can think of. Shavers knocking out Ellis with a head holding uppercut is far from clean.
Julian Jackson vs Buster Drayton. Jackson hits him and then points to the ground, all before Drayton even hits the ground.
The one fight that stands out in my mind where I thought one punch had killed someone was Hamed's devastating knockout of Sergio Liendo, sickening... http://youtu.be/20VNJ993K_4
Roy Jones v. Art Serwano Serwano convulses on the canvas. It really looked like he had a brain injury from one devastating punch. Fortunately he was okay. Also, Saad Muhammad's one punch left hook/uppercut stoppage of Lottie Mwale is the best one punch ko I've ever seen.