Adam Carrikers worst fears were realized Monday morning when it was confirmed that he suffered a torn tendon in his right leg during the Redskins' 31-28 loss in St. Louis.Carriker was injured on the Rams second drive when he planted his foot and felt a sharp pain. Coach Mike Shanahan said the defensive tore the tendon between his quadriceps at the base of the knee.The injury will require surgery this week and Carriker miss five months.Shanahan said Carriker will be replaced in the starting lineup by Jarvis Jenkins. It also means fellow linemen Kedric Golston and Chris Baker will see increased playing time, while Doug Worthington likely will be signed off the practice squad.We have young guys like Jarvis Jenkins, who now gets the opportunity to start, Shanahan said. A year ago, we lost Jarvis and Adam took over and did a great job. Jarvis will get his opportunity.Cornerback Josh Wilson, meantime, cannot practice until hes cleared in accordance to NFL protocol for concussions. Wilson was injured in the third quarter Sunday during a helmet-to-helmet collision with Rams running back Daryl Richardson."Concussions have a certain protocol that we have to go through and that starts tomorrow," Shanahan said. "So I'll have more information on Wednesday."