Canelo never landed flush on Mayweather's chin. If he'd hit Floyd with that counter uppercut, Mayweather would have been on his ass. RE the rest of your post. The point isn't that McGregor is "feather-fisted." Obviously, he can throw hard shots for a guy his size. The issue is that there is a gap between what's considered extremely powerful striking in MMA and what's considered powerful in boxing. There's also a huge gap in defensive capabilities of fighters and punch resistance. Malignaggi said that McGregor has decent power, but that it's not one shot KO type power for pro boxing. People spent months claiming that McGregor's power was a level above the elite level punchers in boxing (Mosley and Maidana) who landed flush on Mayweather and rocked him. Conar marks were legitimately talking about Floyd getting KO'd by one shot if McGregor landed cleanly when he was fresh. Well, sorry. He just doesn't have the same kind of power and accuracy that those guys do. Not only that, but it's a shit comparison to begin with. Mosley and Maidana are both at least 10 lbs lighter in the ring than Conor. The proper comparison is to heavy hitters his size (i.e. Canelo, Golovkin, Charlo, Lemieux). His power isn't even in the same ballpark. It's just a laughable comparison. Dude is a GOAT-level MMA striker, and nobody can take that away from him. However, the comparisons between his striking abilities and those of actual world class pro boxers need to end.