Explainer: Tua Tagovailoa, fencing response and NFL protocol
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AP source: NFL, NFLPA reviewing Tagovailoa's quick return
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AP source: NFL, NFLPA reviewing Tagovailoa's quick return
Tua Tagovailoa: NFL urged to make 'tangible change' to concussion
Tua Tagovailoa injury puts focus on Dolphins, NFL concussion protocol