I heard he had a concussion. Obviously the subject is getting a lot of attention lately - and deservedly so.
He could be a great addition for some team, his earlier You Tube videos were awesome. However, if that were my kid who was knocked out, motionless on the ground, in need of a stretcher and an ambulance ride to the hospital, I would have to say, son, your playing days are over. Football is great but its not worth risking a permanent head injury for. The results of that are devastating to a person and their family. I wish him the best in whatever course he pursues.