Oakland Raiders quarterback JaMarcus Russell missed practice Friday, increasing the likelihood that Andrew Walter will start against the Carolina Panthers, ESPN.com's senior NFL analyst Chris Mortensen reported, according to a team source.
The Raiders would not confirm the news, but Russell was limited in practice Thursday and did not participate Friday because of right knee tendinitis.
Oakland could also be without rookie running back Darren McFadden for a third straight game. McFadden has been sidelined with turf toe injuries in both feet, though it is his left foot that is causing the Raiders' first-round draft pick the most concern.
McFadden was fitted for a new pair of cleats in hopes of easing the pain in his foot, which still requires him to wear a protective boot when not practicing.
ESPN.com's Chris Mortensen is a senior NFL analyst. The Associated Press contributed to this report.