Speculation is still running rampant as to whether CM Punk's walk out was a work or if he truly is gone from the company, but for right now, we have to operate under the assumption that he is gone.
If he really is done with WWE, then that means the possibility exists that we will never see the Best in the World inside a WWE ring ever again. It's a small possibility, but one that still exists.
That means that the run he had from 2006 through the beginning of 2014 is what we have to look back on to remember the man that turned WWE upside down.
Punk has had many memorable feuds throughout his nearly eight-year run with the company, but there are a few that stand out as the most memorable.
Hopefully, the Second City Savior is not done with WWE, but let's look back on his five greatest feuds from his WWE career.