I can't name just 1...

But I'll got with whatever comes to mind 1st:

All time...

I have to go with Salvador Sanchez beating Wilfredo Gomez.

http://www.youtube.com/watch?v=a5KZxUvLonI

http://www.youtube.com/watch?v=0i8pd...eature=related

http://www.youtube.com/watch?v=kFoV3...eature=related

http://www.youtube.com/watch?v=ReqfN...eature=related


Of recent times I'll got with SSM turning back the hands of time and beating the Plaster out of Margarito...

http://www.youtube.com/watch?v=IBOsoIWDgyo

http://www.youtube.com/watch?v=fnwJDfKrg6A

http://www.youtube.com/watch?v=ohekuXhVd4Y

http://www.youtube.com/watch?v=nsyjxR_1DWQ