Dana White: Conor McGregor retirement would have USADA implications

If Conor McGregor truly plans on retiring, it would set off a domino effect beyond just a change in the main event of UFC 200.
There would be a new featherweight champion, of course. UFC president Dana White has already indicated that should the reigning titleholder end his career, McGregor's belt will be vacate and awarded to the winner of the Frankie Edgar vs. Jose Aldo fight at UFC 200.
But there are also implications involving USADA's anti-doping testing that would potentially complicate McG