It was the sixth concussion for an Eagles player this season. In each of the previous five, the player missed at least the following game.
Reid said that Jean-Gilles had a headache the Monday after the game, but that his "symptoms went away quickly."
"All these [concussions] are different, so you just have to take them as they come," Reid said.
Cole, who opened the season as the starter, struggled when he came in for Jean-Gilles. The interior of the Eagles' line had trouble containing Redskins defensive tackle Albert Haynesworth a month ago.
The Eagles will be without defensive backs Nate Allen (neck) and Ellis Hobbs (hip). Rookie Kurt Coleman will make his first career start in place of Allen at free safety and Dimitri Patterson will take Hobbs' spot at cornerback for the second straight week.
Torain is likely starter Ryan Torain
appears to be ahead of Clinton Portis
as the Redskins seek a healthy running back for Monday night. Washington coach Mike Shanahan
said Saturday that Torain was close to full speed after suffering a hamstring injury two weeks ago against Detroit. He added that he did not want to rush the return of Portis, who has missed four games with a torn left groin.
Despite a strong preseason and being active for the season opener, rookie tight end Clay Harbor
has not dressed for the last seven games. He said that he needed to improve his blocking and get better acquainted with the Eagles' offense.
"Somebody could look at it as if you missed all these games," Harbor said. "I look at it as if it was just a little redshirt. It got me ready."
The Associated Press contributed information for this article.
Contact staff writer Jeff McLane at 215-854-4745 or firstname.lastname@example.org. Follow him on Twitter at www.twitter.com/Jeff_McLane