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Tua exits game after hard hit (0:41)

Tua Tagovailoa is slow to get up after a blow. There is a 0:41

12:56 AM AST

According to a league source, the NFL Players Association wants to review the league's concussion protocols after Miami Dolphins quarterback Tua Tagovailoa returned to the game.

After hitting the ground hard late in the first half, Tagovailoa was questionable to return and the team said at halftime that he was questionable to return. He scrambled out of the pocket and threw the ball to Jaylen Waddle, who was pushed after the throw. The quarterback fell backward and hit his head on the ground, while Milano was flagged for roughing the passer.

As he tried to return to the huddle, Tagovailoa fell and was taken to the locker room. If a player shows signs of a concussion, he must be removed from the game and evaluated on the sideline.

The sideline concussion assessment involves a six-step process that tests the player for any "no-go" signs, a video review of the play, and review of concussion signs and symptoms. The player must be taken to the locker room for a full review if the sideline assessment is positive or negative.

The Dolphins won the game 21-19 after Tagovailoa came back to the field. After the game, head coach Mike McDaniel said that Tagovailoa's back was the problem, having hurt it during a quarterback sneak.

Tagovailoa said that after the hit from Milano, his back locked up and he stumbled.

When it happened, it was sore. Any competitor that wouldn't want to come out would have done the same thing. I was trying my hardest to get back up and running.

Tagovailoa threw for 186 yards and a touchdown. He said he would have tests on Monday to see how he is.

The Dolphins will play a Thursday night game in Week 4. If Tagovailoa can't play, Teddy would start.