From what I understand he has really struggled to keep his alcohol under control and has really ticked off some people around the NFL with some of his antics when drunk. In fact the plane ride home from the Super Bowl is why he was cut from the Broncos. I guess the plane is divided into 2 sections with Front Office/Coaches in the front and players in the back and he went up with all the coaches and FO people and started dancing around and really made a fool of himself. Wasn't long after they let him go.
Yeah seems like he has some issues outside of football that he needs to get some help for. I mean Ryan Murphy got sent home from the SB after his prostitution thing and he is back on our PS, Brewer's issues seem pretty serious. I hope he gets help.