I don't mean this in a bad way, BUT, Dez is the WR equivalent of Marion Barber at running back in his prime. He is so emotional and violent and expends so much mental and physical energy he actually wears himself out and hurts himself sometimes and then blanks out mentally at times.
Love the player and if he can smooth out those rough edges he has the talent and ability to be best receiver in the league. He looked like a man amongst boys in first 15 minutes and then was a risk to play after he needed IV. He was worn out.