Darren McFadden will not play on Sunday against Denver because of a sprained right foot, giving Michael Bush his first start of the season. McFadden hurt his foot in the first quarter against Kansas City two weeks ago. He did not practice at all during the bye week or this week. Coach Hue Jackson gave no timetable on his possible return. "I know we're making progress each and every day," Jackson said. "I think he's getting closer and closer. To me, that mid-foot sprain, you just got to take it day to day."