I'd pick Floyd too but if we're talking prime Naz it'd be close.

I get the impression that alot of people are basing what they know of Naz on the Barrera fight or at least fights towards the end of his career. He was ruined by then and a very poor version of the Naz 4/5 years earlier. Saying he was easy to hit is a prime example of this. A prime Naz has better reflexes than anyone Mayweather has fought.