What would have happened to Mayweather if this punch landed on him?

It would have never hit him. And I doubt very seriously that Mosley believed the punch Pac hit him would have knocked Mayweather out. Mayweather took one of Mosley's biggest shots, and Mosley hits harder than Pac. Soo, super fail

 

I'm at work so can't view the link yet. Which punch was it? Hatton or Mosley?

If it was the Hatton punch, he may have likely gotten a knockdown. No KO though.
If it was the Mosley punch, Pac hit Mayweather with a harder left in the 4th rd than he did Mosley.

 

That's a Pac with two working hands.
:bbb
That shot would land and mayweather would be on the ground with his leg twitching.:thumbsup

 

And yet Floyd allowed Manny to tee off on him on the ropes and went nowhere. :huh

 

Based off of you liking Manny and not liking Floyd...

 

he goes no where.

 

That punch wasn't even that hard. Probably nothing more than stuns him at best.

 

Didn't look like a good connection, like his punch deflected.

 

That punch maybe makes floyd go defensive for 30 seconds or so. But he is not actually wobbly or visibly hurt. The shot Pac landed on Hatton would knock down floyd probably though... But mayweather most likely would not get hit by that shot.

 

He would poke out his lower lip while covering up his body and shaking his head.. The end...

 

I'd say flash knockdown. Mayweather would be hurt, but not lay on the canvas chilling like Mosley. He'd experience flash knockdown and recover quickly.

 

He would take that shot easily, like light refreshments. Without a single shred of doubt

 

Floyds chin is not the greatest, it's OK but if it was so great he wouldn't get buzzed every time a flush shot landed. It's his defense that's amazing not his chin.