NFL and NFLPA to make changes to Concussion Protocol to improve player safety after Tua injury
NFL, NFLPA agree to modify concussion protocols following completion of Tua Tagovailoa investigation
Explaining the NFL's latest concussion controversy and policy change : NPR
Steelers' Pickett exits, returns, then placed in protocol
Dolphins followed concussion protocol with Tagovailoa's injury
Under the blue tent: How the NFL's concussion protocol went from a 'joke' to the gold standard
Tua Tagovailoa's leadership key in Miami Dolphins' offensive success
NFL's concussion protocol modified after Tagovailoa review
NFL: Concussion issue a major headache for NFL – The Mercury