I think Bradley was having some success early, but the constant power shots Pacquiao was landing made him go from offensive to defensive. His calf muscle injury notwithstanding, Bradley was getting hurt and made the adjustment of backing off Pacquiao in order to survive. Pacquaio picked up the pace and kept Bradley in retreat. I still feel Pacquiao beats Mayweather, simply cuz Im convinced that the shots Pacquaio was repeatedly landing on Bradley would put Mayweather down on his ass. Mayweather cant take power shots to the face; he's not used to that. He never has taken those shots. I think when he does take them, he wont react to them that well. And the success Bradley had was due to his aggressiveness in going for the KO. Mayweather would not be that aggressive.
Maybe, but Im pretty sure Mayweather could have avoided a lot of those compared to Bradley. Mayweather is not going to be swinging from his heels for the fences and has MUCH more defensive prowess.