Never believe everything that comes from uncle Chael.

The ufc Isn't saying $hit because their too busy scrambling to make a fight or gettin to the bottom of the Nate [Bleeeeep!]. There is way to much money on the line for the organization.
Usada doesn't make $hit public because they leave it to the organization and the fighters to spill the beans and make themselves look like asshats.
If the ufc comes to Leon w enough dough to save the day, the dude will be there on fight day, make weight and give masvidal one hell of a scrap. He's game as Fvck and it makes sense.