Is Mike Shanahan To Blame for Robert Griffin III's Knee Injury?

Robert Griffin III entered the Washington Redskins playoff game against the Seattle Seahawks with a strained ligament in his right knee and left by re-aggravating it. He may have possibly torn some of those ligaments! Is head coach Mike Shanahan to blame for leaving him in?

http://www.youtube.com/watch?v=21oSE7LjrOQ&feature=youtube_gdata