The SCAT3 is a tool that I've used on sidelines and in the emergency department with patients. It is extremely difficult for a player to fool this test. Is it perfect? Absolutely not. I don't know what test the NFL uses, but it definitely will have similarities in testing. If two experts are saying he didn't have a concussion, then 95% likely he didn't have one.
Br J Sports Med-2013-Consensus statement-259.pdf
Clay, you don't know shit about sports or medicine. Stick to making gifs kid.