Westbrook, who also has been bothered by a sore ankle, practiced twice this week. He deemed himself ready to go Friday before the team left for its flight to California.
"I'm feeling a lot better," Westbrook said. "I'm ready to go."
Westbrook, already limited much of this season with knee and ankle injuries, suffered the concussion when he took a knee to the head in the Eagles' Oct. 26 win over the Washington Redskins.
Westbrook sat out one game and practiced last week before Philadelphia's game against Dallas, but ended up sitting out because of a headache. Reid said there should not be a similar problem this week.
In the five games Westbrook has played this season, he has split time in the backfield with rookie running back LeSean McCoy, the team's second-round draft pick from Pitt. For the season, Westbrook has carried the ball 41 times for 197 yards, an average of 4.8 yards per carry, and has scored one touchdown. His longest run was 25 yards against Oakland. He has also caught 17 passes for 130 yards and a touchdown.
Asked what Westbrook was listed for Sunday's game, Eagles coach Andy Reid said, "Playing."
Officially, Westbrook is listed as probable, which means there is a 75 percent chance he will play. Reid made it sound more definite than that.
"He'll continue to rotate and we'll just see how he does," Reid said. "I'm not going to just throw him in for the whole game. LeSean has done a nice job when he's been called on, so that gives us some flexibility."
Reid declared both wide receiver Kevin Curtis (knee) and linebacker Akeem Jordan (knee) out for Sunday's game. Left tackle Jason Peters (ankle) did not practice all week, but will make the trip and is listed as questionable. "He's making progress," Reid said. "The ankle is still a little tender. But I'm waiting to see how he is." Peters will be a game-time decision. If he cannot play, left guard Todd Herremans is expected to move outside to tackle and be replaced by Nick Cole and Stacy Andrews. ... Kick returner Quintin Demps returned to practice Friday and will take over the kickoff returns for Ellis Hobbs, who is on injured reserve.