Browns' Deshaun Watson carted off with noncontact Achilles injury

CLEVELAND -- Browns quarterback Deshaun Watson is believed to have suffered a season-ending right Achilles injury but will undergo testing to confirm, coach Kevin Stefanski said after his team's 21-14 loss to the Bengals on Sunday.

Watson suffered the injury when his leg appeared to hyperextend on a noncontact play as he tried to carry the ball on the first play after the two-minute warning. Watson immediately gave himself up and fell to the ground.

Shortly thereafter, a cart came onto the field and carried off an emotional Watson. The entire Browns sideline came onto the field as he was placed on the cart.

Watson was ruled out shortly afterward.

The Browns had made Jameis Winston inactive as the emergency third quarterback, so Dorian Thompson-Robinson entered the game to replace Watson and was 11-of-24 passing for 82 yards and two interceptions. He suffered a finger injury in the fourth quarter, however, and was replaced by Winston, who was 5-of-11 passing for 67 yards and a touchdown pass to David Njoku .

Watson, in his third season in Cleveland, has struggled, posting the lowest QBR of all qualified passers. He was 15-of-17 for 128 yards Sunday before the injury.