We just got word from our own David Pingree that San Manuel Yamaha's James Stewart may be out of the X Games due to a shoulder injury sustained on the last lap of SuperMoto qualifying today. Sources close to Stewart say he's going to get his shoulder checked out, but as of now it looks like he is out of both SuperMoto and  Moto X Super X. Stay tuned to Racer X Online for an update as we learn more.