Watching the slo mo replay several times, I don’t think he had a concussion in the first place, he never hit his head on a helmet or the ground that I could see. However his head bends forward alarmingly. He either got choked or some sort of spinal shock, which turned into loopy behavior like a concussion. Not an original thought, several professional talking heads made the same observation. I’m sure neither KC nor Mahomes would actually risk his health (yes, I note your sarcasm), especially with a 10 year contract.