Probably either Hearns KOing Duran, http://www.youtube.com/watch?v=N-Ipn_Y3iNM (Start at about 3:07) Marciano taking out Walcott in their first bout, http://www.youtube.com/watch?v=i6gqdwVBcCY or Walcott KOing Charles. http://www.youtube.com/watch?v=EZRKASFWsWw (Start around 2:55)
Also, Tyson knocking out Michael Johnson is worth a mention. Be sure to watch all the way through to the replay at the end. http://www.youtube.com/watch?v=8-f8JLui0Ms
randy turpin KO'd luc van dam with a right hook on the ropes.van dam nearly bent double under the impact.
Ummmmm............Jackson-Graham is an obvious chocie. The right hand Eubank landed on Reginaldo Dos Santos is beautiful too.
personally i prefer the left hook.ray robinson's KO of gene fullmer is probably the best. walcott's KO of ezzard charles is another. my dads favoutite was bob foster landing on mike quarry.
What about that punch Shavers put Holmes down with? Holmes getting up and winning the fight seems like a miracle to me...
So many choices...my two nominations (of recent times at least) would be Hearns knocking out Duran with that amazing right hand, and the absolute bomb Jackson landed on Graham. I'd say Jackson's punch would be my number one choice, if a gun was put to my head.
both of those were brutal.the jackson fight moreso because he was being given a boxing and then..........wham.
Derrick Jefferson vs Maurice Harris, both of these guy suck but that was still one hell of a one punch knockout.
I would say Hearns/Duran. Jackson/Graham, while a huge KO no doubt, is overrated because it looks brutal. But it was more a result of positioning rather than power. Jackson was going backwards at the time, and it was more of a counter punch. Hearns' punch was a full body, extended right hand, at the absolute perfect distance. There was a lot more power behind that punch.