Mayweather calls out UFC and MMA as a whole...

[EliotSpitzer]

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The biggest boxing matches almost always involve no more than 6 total fighters. The biggest MMA matches involve 18.

It's really not fair to compare.

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Sure it is. The size and quality of the cards is another reason MMA will soon overtake boxing as the number one combat sport in the U.S. Boxing is on its way to becoming a marginal sport like Arena Football or the WNBA while MMA is on its way to becoming awesome like pro wrestling was in the 80's.