Scott bounced his head on the turf during a kickoff return seconds before halftime. He was able to get up and sit in the back of a cart as he was driven off.
Browns wide receiver Mohamed Massaquoi and tight end Benjamin Watson were also lost to head injuries in their win over Seattle.
Massaquoi and Watson were both injured in the closing minutes of the first half.
Massaquoi was hit by Seahawks cornerback Brandon Browner on an incompletion over the middle.
Last season, Massaquoi missed one game with a concussion after he was hit by Pittsburgh linebacker James Harrison, who was fined for the helmet-to-helmet blow.
Seattle running back Marshawn Lynch injured his back in pregame warmups and did not play. Starting cornerback Walter Thurmond broke his leg and is done for the season.
The Tampa Bay Buccaneers lost Earnest Graham in their loss to the Chicago Bears after the running back injured his right ankle during the first quarter.
Graham went down untouched after catching a pass from Josh Freeman, falling to the turf before being hit for a 2-yard loss.
Graham started for the injured LeGarrette Blount.
Oakland running back Darren McFadden left the loss to the Chiefs in the first quarter with an injured right foot.
Broncos running back Willis McGahee left the win over Miami in the third quarter with a broken hand. It was wrapped afterward, but he said he would be fine.
Minnesota Vikings wide receiver Percy Harvin left the loss to Green Bay with a rib injury that has bothered him for the past few weeks.
The Vikings have had to limit Harvin’s plays over the past two weeks while he has been dealing with the injury, which first occurred in training camp and resurfaced during the season.
Coach Leslie Frazier said it was too soon to tell whether Harvin would be available for the game at Carolina next Sunday.