NFL, Players Union Agree to Change Concussion Protocol - The New York Times
NFL's concussion protocol modified after Tagovailoa review
Explaining the NFL's latest concussion controversy and policy change : NPR
NFL under fire over its concussion protocol following Tua Tagovailoa's back-to-back game hits - ABC News
Dolphins QB Tua Tagovailoa in Concussion Protocol Once Again – NBC 6 South Florida
Buffalo Bills player is in critical condition after collapsing in game : NPR
Bills hang on for 34-31 wild-card win over Dolphins
The Tua Tagovailoa effect? At least a dozen players benched Sunday under NFL concussion protocols
NFL's chief medical officer says Tua Tagovailoa showed 'nothing that would have triggered' concussion protocol