Varner stepped in on short notice against the great hype train of Barboza (coming off the Etim KO no less) and won. He's fought Bendo, Cerrone, Franca. I have a hard time believing Melvin "Rear Naked Joke" Guilliard would make him scared to fight.
Guilliard is talented when he's not mentally screwing himself, but I have to root against him after hearing him completely discredit the Lauzon loss like "that doesn't count, I'd smash him 100% of the time in rematches." Melvin gets furious at Lauzon talking back, but Joe didn't start until Melvin started insulting Joe after already tapping.
Seriously, the COMMISION WITH ACTUAL DOCTORS wouldn't clear him. Why do people think he randomly agreed to fight Melvin, went through a full training camp, and THEN pussed out?