Considering CM Punk's introduction to the WWE Universe came via Paul Heyman and the re-branded Extreme Championship Wrestling, it should come as no surprise that Punk had a reputation for stepping up his game when it came to matches with hardcore stipulations. His storied past in the indies and overseas prepared him to be able to withstand any punishment the WWE could dish out, including events likeOne Night Stand andExtreme Rules.

While Punk has stepped away from the squared circle to pursue a MMA career under the UFC banner, his experience at WWE's hardcore events is worth reviewing asWWE Extreme Rules 2016 is now less than one week away.

What follows is the onepart ina series of Extreme RulesRésumé articles in which we take a look at a current or former WWE Superstar's history at Extreme Rules(such as Triple H, John Cena and The Shield) and what their past experiences might tell us about that same (or a similar) competitor atWWE Extreme Rules 2016 on May 22.

Extreme Rulesrecord

The self-proclaimed "Best in the World" competed a total of seven times atExtreme Rules and it's predecessorOne Night Stand. Only twice did he come up with the short end of the stick, with an overall record of 5-2.

Despite his relatively high profile as a WWE Superstar, only two of Punk's seven matches atER were for WWE gold. Both times, he walked out with the gold, taking the World Heavyweight Championship in 2009 and successfully retaining the WWE Championship in 2012.

Main event matches

CM Punk often complained about the fact that John Cena would frequently headline events over him, and the fact that Punk only headlinedExtreme Rules one time -- his WWE Championship Match against Chris Jericho came before a non-title match between the Cena and Brock Lesnar-- is evidence of that complaint.

In 2009, when Punk challenged Jeff Hardy for the World Heavyweight Championship (only by cashing in his Money In The Bank contract), it was the unscheduled final match of the evening.

Worthy competition

At 2007'sOne Night Stand, Punk's competition was pretty forgettable: ECW's "New Breed" Elijah Burke, Matt Striker and Marcus Cor Von.

After that, all of Punk'sONS/ER opponents are potential (or definite) future WWE Hall of Fame inductees.

Unquestionably headed for the WWE HOF include such opponents as Chris Jericho, Randy Orton, Rey Mysterio, and Big Show. One would expect that Umaga, Jeff Hardy, and Chavo Guerrero will also join the club some day. John Morrison and Tommy Dreamer may be on the fence.

Most extreme moment(s)

While Punk didn't have any moments that stuck out as especially extreme, he has a lot of memorable moments from theExtreme Rulesevent. He cashed in his second Money in the Bank contract after Jeff Hardy won the World Heavyweight Championship from Edge in 2009. He also put on a spectacular performance against Chris Jericho in a Chicago Street Fight in front of his hometown crowd in one of the most well-received WWE PPV events of the modern era.

Punk has one of the most eclectic lists of match stipulations from this event. Along with the Street Fight, he's competed in match with such extreme stipulationsas Six-Man Tag Team Tables, Singapore Cane, Samoan Strap, Last Man Standing and even a Hair Match in which he would have had to shave his head if he lost.

Predictions forWWE Extreme Rules 2016

Obviously, CM Punk won't be making an appearance atWWE Extreme Rules 2016. So what can be learned from CM Punk'sExtreme Rules past that would be helpful for the WWE Universe as 2016's event approaches?

CM Punk represented the kind of wrestler that Vince McMahon didn't like and the WWE Universe loved. As a well-traveled wrestler, he was the antithesis of WWE's homegrown product.

AJ Styles is a well-traveled grappler who certainly wasn't a product of the WWE machine. As he challenges Roman Reigns for the WWE World Heavyweight Championship, will he have the same luck atER as CM Punk did?

WWE Extreme Rules 2016airs live on the WWE Network on May 22nd.

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