Two Massive KOs Over the Weekend

I've been a bit down about all the recent cancellations (Rios-Gamboa, Peterson-Khan 2, Ortiz-Berto 2 -- the last 2 due to positive PED tests), but these two massive knockouts over the weekend deserve recognition:

Mikkel Kessler TKO 4 Allan Green - Instant wave-off

Karim Mayfield TKO 5 Raymond Serrano - The fight-ending blow occurs at the end of the fourth round, at the 2:49 mark in the video

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