Conor McGregor, UFC tension in middle of decision to retireSI executive editor Jon Wertheim looks at why Conor McGregor decided to walk away from UFC in the middle of his prime.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceSI executive editor Jon Wertheim looks at why Conor McGregor decided to walk away from UFC in the middle of his prime.Loading recommendations... Please wait while we load personalized content recommendationsPublished Apr 20, 2016 | Modified Apr 20, 2016SI STAFFShare on FacebookShare on XHome/MMA