You don't know what you're talking about. It was very close up untill recently between their numbers and his best PPV is still in the all time top 3. Mayweather was very slightly ahead right before the Pacquiao fight and of course after that PPV it's no longer close. But Oscar was the first PPV megastar and did very consistent numbers for quite a few years in his prime, in fact no boxer not even Tyson and Holyfield was close to his numbers up untill Floyd, so how Floyd can't be the first.
Bro, I think you're mistaken.
1.)
Mayweather vs Pacquiao (May 2015) 4,600,000 - $410 million revenue.
2.)
Mayweather vs Canelo Alvarez (September 2013) 2,200,000 - $150 million revenue.
3.)
Mayweather vs Oscar De La Hoya (May 2007) 2,480,000 - $136 million revenue.
4.)
Mike Tyson vs Evander Holyfield II (June 1997) 1,990,000 - $100.2 million revenue.
5.)
Mike Tyson vs Lennox Lewis (June 2002) 1,950,000 - $112 million revenue.
6.)
Mike Tyson vs Evander Holyfield I (November 1996) 1,590,000 - $77.9 million revenue.
7.)
Mike Tyson vs Peter McNeeley (August 1995) 1,550,000 - $96 million revenue.
8.)
Mayweather vs Shane Mosely (May 2010) 1,400,000 - $94 million revenue.
9.)
Oscar De La Hoya vs Felix Trinidad (September 1999) 1,400,000 - $64 million revenue.
10.)
Evander Holyfield vs George Foreman (April 1991) 1,400,000 - $80 million revenue.
11.)
Manny Pacquiao vs Juan Manuel Marquez III(November 2011) 1,250,000 - $75 million revenue.
How many of that top 11 has De La Hoya in it?
You mention that Mike and Evander were not even close to Oscar's numbers? Well Holyfield did 1.4 million against Foreman and 1.59 and 1.99 million respectively with Tyson. Tyson did 1.55 against McNeeley even - so I think you're a little off with your claims sir.
Mayweather is the reason why that Oscar fight was so big, 2 huge names colliding and you know this because Oscar's nearest number other than that 2.48 million was a whole million less against Felix.
Mayweather is the PPV king, Mike Tyson in 2nd place, no problem in admitting that.