NFL, players' union agree to modify concussion protocol after Dolphins QB Tua Tagovailoa injury
NFL, NFLPA update concussion protocols, here's what the 'Tua rule' will include
Miami Dolphins Quarterback Tua Tagovailoa Suffers Scary Head and Neck Injury
Dolphins QB Tua Tagovailoa (concussion) ruled out for playoff game vs. Bills
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The NFL and players union agreed to an updated concussion protocol : NPR
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