Why? Its not as if there was any resistance to overcome in the first two rounds is it?

probably not, but running his mouth off and the fact that he made almost not attempt to engage until the 3rd round doesn't exactly get rid of any doubts.

the fact that he did fuck all till the third round and tells his friends and family to stick money on the third don't prove anything but it doesn't exactly push it far outside the realms of possiblity either does it?

This shit happens in boxing, usually the other fighter has been paid to take a dive in the Xth round (but why bother with such a gulf in class?) and usually the other fighter has the brains not to say anything afterwards.

maybe Haye was cautious because the 3 stone got to him and he was wanting to draw a counter out of (the always extremely negative) Harrison? Probably but anybody with half a brain who would be overly surprised to learn that haye saw how rigid harrison looked and waited till the 3rd to KO harrison, either to help his mates at the bookies/be able to brag about calling the round could do with a bullet also. Fact.