The NFL Players Association has fired the unaffiliated neurotrauma consultant who evaluated Miami Dolphins quarterback Tua Tagovailoa after he stumbled off the field against Buffalo last weekend, a person familiar with the decision told The Associated Press on Saturday.

The person who confirmed the firing, which was first reported by Pro Football Talk, spoke to the AP on condition of anonymity because a joint review by the NFL and its players' union into Tagovailoa's quick return to Sunday's game is ongoing.

There are three unaffiliated neurotrauma consultants (UNC) at each game. They are jointly paid by the league and the players' union to work with team physicians to diagnose concussions. The NFLPA is exercising its right to terminate the UNC directly involved in the decision to clear Tagovailoa, who sustained a concussion following a frightening hit just four days later at Cincinnati on Thursday night.