I'm hearing he had another concussion and decided to call it quits and focus on graduating. Can't argue with that decision if true. That said, losing a solid contributor on special teams isn't a good thing for this team.
Dook might not have been running all over our ST, should he have been healthy to play. One guy can make a huge difference with his experience. He was a perfect specimen filling his lane, fast and tough! Took on many blockers, got several shots to his head. Not his first concussion.