Miami Dolphins quarterback Tua Tagovailoa has been rushed to hospital after suffering head and neck injuries in Thursday's game against the Cincinnati Bengals.

The Dolphins QB appeared seriously hurt in a scary incident after he was slung to the ground in a tackle from Josh Tupou with 5:46 remaining in the second quarter.

Tagovailoa seemed immediately dazed and awkwardly raised his hands with his fingers extended while on the ground.

There was a lengthy delay as medical staff attended to the 24-year-old who remained on his back on the ground with minimal movement before he was stretchered off the field. He was immediately taken by ambulance to a nearby hospital in Cincinnati.

The Dolphins confirmed he was out of the game with head and neck injuries and added: "Tagovailoa has been taken to a local hospital for further evaluation. He is conscious and has movement in all his extremities."

The incident comes after Tagovailoa was listed as "questionable" for the game due to back and ankle problems which limited his ability to practice this week.

Tagovailoa also took a heavy hit in last week's 21-19 win over the Buffalo Bills and stumbled to the ground in the aftermath, yet was cleared of concussion and permitted to play on.

Dolphins head coach Mike McDaniel had insisted that the proper concussion protocols were followed and that the QB was cleared by the team and the independent neurologist.