Just rewatched the jones jr-virgil hill fight and couldnt believe the sheer power he managed to get into that rib shot.
Only one that comes close to that is hattons on castillo.
Both you mention come top for me with RJJ's KO in first place. It was not just the power of the shot but the accuracy, he could easily have hit an elbow and smashed his hand but it was utter perfection in placement. Looked fucking painful aswell
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