Following his retirement from the wrestling world in 2014, CM Punk pursued a short career in mixed martial arts by signing a four-year contract with the Ultimate Fighting Championship (UFC). On September 10, 2016, after nearly two years of training, he made his debut in the Las Vegas federation, being defeated in the first round by welterweight Mickey Gall.
On 9 June 2018 he also lost his second and final United Fighting Championship match, fought against Mike Jackson in Chicago. During his 15-year career, he won the Worldwide Wrestling Entertainment (WWE) Championship twice, WWE's World Heavyweight Championship three times, and the ECW and ROH World Championships once each.
By winning WWE's World Tag Team Championship (with Kofi Kingston) and Intercontinental Championship, he became WWE's 19th Triple Crown Champion and the fastest to achieve this feat (203 days). He was voted WWE Superstar of the Year at the 2011 Slammy Awards and Wrestler of the Year in 2011 and 2012 by readers of Pro Wrestling Illustrated.
On the latest episode of Cody and Jennifer Decker’s Swing and Mrs, the 41-year-old discussed what it would take to bring him back to the ring: “I get that question a lot, and the answer changes. You know, it’s a very fluid answer.
Currently? If the business was right and I had somebody that motivated me across the ring from me, I think, might be able to get it done. But you know, nobody has dangled the correct carrot”. Alongside his swing with United Fighting Championship, CM Punk also announced for the Cage Fury Fighting Championships.