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

[ozyman]

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How long would it take Mayweather to develop enough of a ground game to be able to fight in the UFC? I'm guessing about 18 months of intense training and he would be able to have enough ground defense to get into a ring. He probably won't put the effort in (he seems to think he could step in already, which is just stupid). But I don't think there's much doubt that if he really wanted to he could dominate in the UFC. He's just a much better athlete than any of those guys.

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Mayweather would be giving up 20+ lbs on fight night to any legimate 155lber in the UFC. Sean Sherk fought at 170 lbs he moved down to 155. He would need to become a BJJ wizard to overcome the weight difference at 155.