Rashad Jennings has a concussion

AP

In a development that will surprise no one who saw the video of Raiders running back Rashad Jennings hobbling off the field after taking a knee to the helmet, Jennings has a concussion.

The team advises PFT that Jennings has been given that official diagnosis.  He’ll be unable to practice or play absent clearances from an independent neurologist.

The Raiders next play December 8, against the Jets.

Jennings had generated 553 yards from scrimmage in four prior games.  He had only 35 yards rushing on 17 carries against the Cowboys on Thursday.

If Jennings can’t get clearance to play, former starter Darren McFadden presumably climbs back to the top of the depth chart.