Did a Concussion Have Something to Do with CM Punk Leaving the WWE?

ESPN Cleveland reported Casy Kulas reports that there may be some concussion issues that came into play during CM Punk's argument with WWE officials on Monday. Kulas posted to Twitter:

Casey Kulas @CaseyKulas

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My info on CM Punk: I do know from sources that at #Raw in CLE there was heated exchange backstage between Punk & staff. Topic - concussion.

Casey Kulas @CaseyKulas

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Punk was heard arguing with staff saying "I passed all your damn concussion test" and "I'm not going out and telling fans that BS"

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