The joint concussion protocol of the NFL and NFL Players Association is facing serious questions Friday, one day after Miami Dolphins quarterback Tua Tagovailoa suffered a concussion and was briefly hospitalized during his team's 27-15 loss to the Cincinnati Bengals.
The injury occurred with 5 minutes, 15 seconds remaining in the second quarter at Paycor Stadium in Cincinnati. Tagovailoa's head hit the ground when he was sacked by Bengals defensive lineman Josh Tupou. Tagovailoa's arms grew rigid and his fingers curled in what's known as a "fencing response.