In an effort to try to return this season from his LisFranc injury, Raiders running back Darren McFadden has been undergoing CT scans, MRIs and X-rays on his foot and consulting with Dr. Robert Anderson this week, according to a league source. McFadden is considered unlikely to play Saturday at Kansas City but has not surrendered hope of playing against the Chargers in the regular-season finale or in the postseason if the the Raiders can make it there.