The more I watch it, the more I'm convinced he has the worst chin in his division.
That was a fucking clean haymaker right on the chin. Also, he was focusing on punching himself and clearly didn't expect the right hand from Eduardo.
Against Barao, he took a spinning back kick right in the face and then got swarmed.
He needs to improve his defense/awareness and avoid eating power shots, that's the problem. He got hit with literally the same overhand twice in a row.