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Under the blue tent: How the NFL's concussion protocol went from a 'joke' to the gold standard

Richard Sherman once called it “an absolute joke.” Chris Nowinski, a prominent expert, called it “a fraud.”

Throughout its first decade of existence, the NFL’s concussion protocol quickly became a lightweight punching bag. Players, pundits and MDs ripped it to shreds. They branded it futile and faulty. And not even four years ago, in a single 32-day span, a barrage of blatant examples supported their claims.

First there was Russell Wilson, appearing to bypass the protocol altogether.

Then there was Jacoby Brissett, clutching his helmet after a concussive hit, but never missing an offensive play.