Raiders worked out free agent RBs Montario Hardesty, Keiland Williams and Jonathan Grimes. Darren McFadden (hamstring) and Rashad Jennings (hamstring) are both questionable for Sunday's game at Kansas City. That leaves only Marcel Reece and Jeremy Stewart as healthy backs on the active roster. If one of this uninspiring free agent trio ends up signed, we'll know the Raiders expect DMC and Jennings to sit.