He did not hurt Floyd at all. Getting in one good punch does not mean he hurt. Floyd took it then came back to keep schooling and outclassing Pacquiao.
Come on now, Mayweather was clearly buzzed by that punch. He had to shell up and protect himself, no counter punching off the ropes, where Mayweather is “the master”. If anything, this is a testament to Mayweather’s greatness. He adapted and controlled Pacquiao for the rest of the fight, like he always does.
Finally? I have always believed Mayweather beat Pacquiao. Clear victory in a competitive fight. Don’t just assume things because I disagree with you, on a SINGLE moment in a fight.
