I will say that fight will never happen. To Mayweather, his record means too much to risk it, even more than $40,000,000 if you can believe that. And I personally think he would beat pacman. There are both slowing down as the last fights showed so it needs to be next or never. Mayweather needs to train in prison and get out and hit it hard. No time off.
Then there's no understandable reason why Pacquiao would refuse a Olymplic style drug test either.
~Younghypnotic