Pacman is trained in Muay Thai so he'd obviously just smash Fairyweather's legs with kicks or probably just take Fraudweather down and choke him out.
That's one logical perspective slystaff.:bears: Although I think size and strength is actually more telling in boxing than in the UFC to be honest.
Pacquiao Defensive types won't do as well in MMA and Mayweather's strength doesn't mean much as he's not a grappler.
I'd have to guess Pac he knows how to knee and elbow he'd prolly get floyd down and get a stiff rod and try to insert it IMO this fight will happen in Boxing and FLoyd will knock him out but in MMA i'd go with Pac and pac WOULD get a boner