First thing to note about NSB, do NOT make any threads like this about Floyd or Pac. You will be attacked by their hardcore fans who believe they are God. People seem to forget that in Boxing, ANYTHING CAN HAPPEN. So as extreme as it may seem, it's definitely not impossible.
That being said, one of Mayweather's best traits is that he has the ability to adjust and change his game up. I'm sure if that was the case, Floyd would change gears and go on the offensive.