Detroit Lions cornerback Saivion Smith, who was transported to a local New England hospital Sunday for to be evaluated for a neck injury, later flew back to Detroit with the team and is in concussion protocol, a source told ESPN's Adam Schefter.
Smith was carted off the field in an ambulance during the opening quarter of the Lions' 29-0 loss to the New England Patriots.
Smith's father and uncle joined him in the ambulance from the stands after Lions teammates circled around him.
The Lions said Sunday he had movement in his extremities.