PHILADELPHIA - Eagles running back Brian Westbrook will have to wait at least one more game to return to the lineup.

Westbrook sat out Sunday's NFC East duel against Dallas, a 20-16 loss, because of side effects related to the concussion he suffered two weeks ago. The 30-year-old appeared ready to play again when he was interviewed last Wednesday but apparently experienced some symptoms Friday that prompted the Eagles' training staff to deactivate him for the second straight game.

"On Friday afternoon, Brian began experiencing symptoms of a mild headache," Eagles trainer Rick Burkholder said in a statement before Sunday's game.

"From that point forward, we had Brian re-evaluated by (team internist) Dr. Gary Dorshimer and we put him through extensive testing.

"Even though those tests were determined to be negative, we all thought it would be in the best interests of Brian and the team that he should be deactivated for tonight's game. We will continue to evaluate Brian this week."

Eagles coach Andy Reid gave a different account of Westbrook's progress Friday, however. He indicated that he simply held him out of practice that day to give him a break from two straight days of intense work.

"I just held him out so he could rest up," Reid said Friday in quotes provided by the team.

Asked if Westbrook had a headache Friday, Reid replied: "No, he's all right."

Reid then listed Westbrook as questionable on the injury report, giving him a 50 percent chance of playing.

"He felt good during the week," Reid said after the game. "He practiced during the week and then it was a crazy deal. If he has a headache, then obviously I'm not going to stick him out there."

Westbrook suffered the concussion in the first quarter of the Eagles' 27-17 victory at Washington on Oct. 26. He was diving forward for extra yardage when Redskins linebacker London Fletcher inadvertently kneed him in the back of the head.

Without Westbrook, the Eagles turned to rookie running back LeSean McCoy for the second straight game Sunday. McCoy, a second-round draft pick from Pittsburgh, helped set up the Eagles' first touchdown against the Cowboys by turning a short pass from quarterback Donovan McNabb into a 45-yard gain.

McCoy entered Sunday's game as the Eagles' leading rusher with 294 yards and two touchdowns on 70 carries. He also had 15 receptions for 102 yards.

Lineup changes

Rookie Moise Fokou got his first career start at strongside linebacker in place of injured Chris Gocong. Gocong suffered a quadriceps contusion and strained hamstring against the Giants last week. Fokou, a seventh-round draft pick from the University of Maryland, played solely on special teams the first six games. He replaced Gocong in the second half of the Giants game and registered three tackles.

Fokou had a rough game against the Cowboys. He was called for a holding penalty on the second-half kickoff that erased Ellis Hobbs' 96-yard return for a touchdown. Later in the third quarter, his illegal block during cornerback Sheldon Brown's interception erased a long return by Brown.

Left guard Todd Herremans played most of the first half at left tackle after Jason Peters suffered a sprained ankle in the first quarter. Herremans' last extensive action at left tackle came during his rookie season in 2005. Peters returned in the second half.

Inside the numbers

McNabb had thrown 124 passes without an interception until Cowboys safety Gerald Sensabaugh had one on the Eagles' first possession. ... Eagles entered the game 0-6 on Sunday nights since NBC started broadcasting games. ... Brown's third-quarter interception was his fourth of the season, tying his career-high set in 2005. ... David Akers has hit nine field goals of 40 yards or longer this season.

Out of action

In addition to Gocong and Westbrook, defensive end Victor Abiamiri (sprained knee), wide receiver Kevin Curtis (knee inflammation) and cornerback/special teamer Dimitri Patterson also sat out because of injuries. Curtis underwent arthroscopic surgery three weeks ago and missed his sixth straight game. He is expected to be back from rehabbing in Utah this week.

Bumps and bruises

Peters left the game in the first quarter with a sprained ankle but returned in the second half. Cornerback Asante Samuels suffered a sprained neck in the third quarter. He returned in the fourth quarter.

Hobbs took his Samuel's spot in the secondary. He left the game in the fourth with a neck injury

Up ahead

The Eagles will travel to San Diego, 5-3 after a 21-20 victory over the Giants, for the first time since 1998 next Sunday to take on the Chargers. San Diego leads the series 5-4, but the teams haven't met since 2005.

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