Shane Mosley came about an inch away from doing us all a great service and knocking Floyd the fuck out, but alas he eased up and let Floyd get the momentum back and school him.
Corley also came rather close to KO'n Floyd, though not as close as Shane did.
So it is by no means out of the question that Pacquaio could do it with as many punches as he throws.
The more likely scenario is Floyd playing keep away and out boxing the little cat fish.