CM Punk has officially put an end to his mixed martial arts career after notifying the UFC of his retirement as he returns full time to professional wrestling.
Dana White: CM Punk's UFC career done after loss to Mike Jackson
CM Punk - Wikiwand
CM Punk Wanted To Return To WWE This Year
Unpopular opinion: I don't care if Punk returns to WWE. His legacy
CM Punk, MMA Fighter Page
Jake Paul warned against switching to MMA after CM Punk's failed
CM Punk Releases Statement After Loss To Mike Jackson At UFC 225
Eric Bischoff On CM Punk's Injury, Hopes Punk Can End His Career
AEW's CM Punk trains in MMA gym with ex-WWE star Malakai Black and his wife Zelina Vega ahead of ring return