NFL players are seriously worried about Tua Tagovailoa's health after his scary concussion during "Thursday Night Football" ... with everyone from Tony Gonzalez and Shannon Sharpe to Antonio Brown urging the Dolphins quarterback to consider retirement.
Gonzalez, a Hall of Famer, was broadcasting the Bills vs. Dolphins game ... so he got a first-hand view of all that went down in the 3rd quarter, when Tagovailoa seemed to lose consciousness after a hard collision with Damar Hamlin.