Posted by Gregg Rosenthal on August 19, 2011, 10:04 PM EDT
Promising Cardinals second round running back Ryan Williams was carted off the field Friday night with what appeared to be a potentially serious right knee injury.
The team crowded around Williams before he was carted off. Williams left the field with his head in his hands.
Williams was competing with Beanie Wells for carries in the Cardinals backfield.
The team doesn’t have great depth at the position after trading away Tim Hightower.