In the reports, it stated adam showed up to practice in street clothes wearing sunglass and a baseball cap on backwords.
He was wearing his baseball cap "BACKWORDS"!
It's in human nature to try to prevent any to all unnessary pain. So, why not try to minimize the pain by putting your hat on the right way so the vizor part blocks the sun from his eyes!!! I guess adam was more worried about his image, then is OOOO SOOO SERIOUS CONCUSSION!!!
I doubt he ever had a concussion, and just faked it to get out of practice.