Eagles running back Brian Westbrook was knocked out with a concussion during Monday night's win over the Giants. Westbrook walked off the field after laying motionless for several moments. Philadelphia has back-to-back games against rivals New York and Dallas on the schedule. "We obviously know in this division, it can be a half-game, a game away from you being in first or you being in second," quarterback Donovan McNabb said. Westbrook will go through medical tests before his status for next week is determined.