Conor McGregor retiring… again?  Blog King, Mass Appeal NEW YORK — After profiting from a maniacal career of knocking people’s teeth out, Irish fighter Conor McGregor (21-4) is calling it quits…. again. The 30-year-old UFC star announced his retirement via Twitter on Monday, just five months after getting his ass kicked by Khabib Nurmagomedov during a title bout in Las ...

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