Tua Tagovailoa's Injury Wasn't Just a Failure of Protocol
Investigation: Dolphins followed protocol in Tua concussion check
Explainer: Tua Tagovailoa, fencing response and NFL protocol
N.F.L.'s Concussion Protocol Under Scrutiny After Tagovailoa Injuries - The New York Times
NFL's concussion protocol again under scrutiny after Tua Tagovailoa is hit hard again
Dolphins QB Tua Tagovailoa in concussion protocol again - The Athletic
NFL issues response to Tua Tagovailoa concussion questions
Tua Tagovailoa's parents give update on NFL star amid retirement fears over concussions - Mirror Online
Tua Tagovailoa expected to be interviewed as part of NFL-NFLPA investigation into QB's quick return from injury, sources say - ESPN