Quote Originally Posted by Starr
knockdown is caused by a punch.

Answer me this, would Mayweather have staggered and needed to put his glove on the canvas if Zab hadn't hit him?
Good point.

I think the rule does suck a little. But if they changed it to, "A fighter must be hit cleanly and be damaged by the punch, in order for a knockdown to be ruled." This would leave a judgement call up the ref, and think how much people would disagree with such calls. With the rule the way it is now, there is no room for arguing. He was hit, something other than his feet touched the mat as a result to the punch, it's a knockdown.

It just makes it possible to make sound decisions in accordance with the rules.