Mayweather Jr. swallowed his pride and sincerely stated to Fightnews that he has no plans of competing in any organization of mixed martial arts,
"I apologize to the UFC, sometimes we say things that we shouldn't have said and I'm man enough to admit that. I apologize to the Fertittas, Lorenzo and Dana White (UFC owners). I respect MMA fighters and what they do in the UFC. I have no plans of fighting in mixed martial arts."
http://www.fightnews.com/boxing/bc/perea100.htm