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CM Punk has told the UFC that he has officially retired from mixed martial arts competition as he returns to full-time professional wrestling.
Punk - real name Phil Brooks - made an electric return when he debuted at All Elite Wrestling (AEW) in his home town of Chicago.
He rejoins a pro wrestling promotion for the first time since his messy exit from WWE in 2014.
The 42-year-old remained part of the UFC's anti-doping program through 2020 as he was regularly tested by the United States Anti-Doping Agency (USADA).
In fact, he was actually tested six times in 2020, according to MMA Fighting.
Punk, though, has not been tested at all this year, notifying the UFC about his retirement as he plots another run in pro wrestling.
The former WWE superstar signed with the leading MMA organisation in 2014, making his Octagon bow against Mickey Gall at UFC 203 back in September 2016. He suffered a first-round submission.
Punk then suffered another defeat against Mike Jackson at UFC 225 in June 2018 in his second UFC outing.
But the result was overturned to a no-contest after Jackson tested positive for marijuana.
Punk walks away from the sport with an MMA record of 0-1 (1 NC).
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