McFadden was injured during the Raiders' 28-0 loss to the Kansas City Chiefs in Week 7 and has been inactive for all three of the team's games following their bye in Week 8.
According to Jason La Canfora of the NFL Network, McFadden is expected to miss next week's game against the Miami Dolphins, as well, with a target date for his return being a December 11 game against the defending Super Bowl champion Green Bay Packers.
McFadden's absence means fourth-year running back Michael Bush will start and carry the bulk of the load in the Raiders' ground game. Over the last four weeks, Bush has rushed for 461 yards and two touchdowns since replacing McFadden during the Chiefs game.
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