Matt Schaub was still feeling the effects Wednesday of a concussion from a helmet-to-helmet hit against San Diego, and coach Gary Kubiak said he probably wouldn't play Sunday against Oakland. "It's feeling better, clearing up a little bit," he said. "Headaches are subsiding, so we'll take it day to day." With Schaub likely out, Sage Rosenfels should get the third start of his career and his first since a 22-0 loss to Cleveland in 2005 when he was with Miami.