Matt Riddle has given some insight into the mistake that CM Punk made.

CM Punk, real name Phillip Brooks, was the biggest Superstar that WWE made in this current decade aside from former WWE Champion John Cena. The former WWE Superstar made a name for himself on the independent scene and while working in Ring of Honor.

When WWE finally decided to sign him, it was a big move for the company. The interesting part of Punk’s time with the sports entertainment company was that they were never behind him.

In fact, while he was in OVW, WWE management wanted then booker Paul Heyman to fire him, but the former owner of ECW denied their request.

Fast forward to when WWE decided to re-launch the ECW brand in 2006, Heyman, who oversaw creative alongside Vince McMahon decided to call him up to the main roster and use him.

Punk’s career took off, and he would later hold several championships including the WWE Title. However, after dealing with injuries and not wanting to wrestle anymore, Punk decided to walk out of the company on the Monday following the Royal Rumble pay-per-view event in 2014.

Since he departed from the WWE in 2014 after the Royal Rumble PPV (pay-per-view) event, fans have wanted to see Punk compete in the squared circle again. Instead, he took his talents to the world famous Octagon in the UFC.

However, he lost in his MMA debut against Mickey Gall at UFC 203 in September of 2016 by first round submission. There have been talks about Punk competing under the UFC banner again, but nothing had been made official until this year.

Punk fought Mike Jackson in a welterweight bout at the UFC 225 pay-per-view event on Saturday, June 9, 2018, at the United Center in Chicago, Illinois.

As seen in the fight, Jackson dominated it and Punk showed a ton of heart but was winded after the first round. Jackson was able to pick up the unanimous decision win. Punk did not do a post-fight interview.

Riddle revealed that mistake during an appearance on recently appeared on X-Pac 12360 (transcript courtesy of Wrestling Inc).

"CM Punk, for example, he started training MMA," Riddle said. "Did he start at like a local Jiu-Jitsu gym? No. He went to Duke Roufus, he went to one of the biggest camps in the world with some of the toughest people and I'll tell you this that's probably the worst thing he could've done. Because there are a bunch of killers there that want to beat you up."

"They don't go five miles per hour. They already know all the moves and they're going to put the beat on you because that's what you do in fights. While I personally think he probably should've gone and got a couple personal trainers, like a personal Jiu-Jitsu instructor -- a personal Muay Thai instructor got his hands, his feet, everything educated. He's Jiu-Jitsu educated. And then started to maybe roll with a couple white belts, some blue belts that aren't at the highest level school in your area and then eventually you make your way to the killers. Then you can be a killer yourself. But I think he just hopped in way to quick."