Its amazing the thought processes we have here. We have multiple posters who really thought a professional medical doctor that works for the team they are paid to care for can not make their own decision?
below are some snippets from this article: https://www.boston.com/sports/new-england-patriots/2018/03/07/heres-how-the-nfls-concussion-protocol-really-works/
"After giving the examination, the UNC and team doctor confer on a “go or no-go’’ decision. The NFL prefers the team approach, especially since the team doctor knows the player well."
“There has to be clear consensus,’’ Sills said. “If there’s any hesitancy whether someone is normal or not normal, they’re going to keep him out.’’
"But just because a player passes a test doesn’t mean the doctors are done observing him.
“This isn’t a one-and-done thing,’’ Sills said. “I’m going to watch him during the next set of plays, see how he looks, and probably walk up to him after the series and say, ‘Hey, are you OK?’ ’’
There is much more in the article also
I'd like to see the source that says the contrary if there is one.