Chad made a good point on The MMA Hour when he said that McGregor didn't really ring his bell too many times. The only really bad punch was the KO shot, other than that he ate maybe like 7-8 straight lefts at most but you eat shots like that in a training camp pretty often. And its not like McGregor knocked him clean out either, it was more due to him being gassed than the shot being all that powerful IMO. But then again, its possible that the Aldo war, then the McGregor KO and the Edgar KO consecutively ruined his chin. Hopefully not and hopefully he can come back as good as ever.