Robert Griffin III, quarterback, Redskins: The rookie sustained a "mild concussion," according to coach Mike Shanahan, when he took a shot to the helmet while scrambling to try to avoid a sack during a 24-17 loss to the Falcons. Griffin left the game about 10 minutes in to the second half and did not return. He also was treated for a cut on his chin. About three hours after the game, Griffin wrote on Twitter: "I'm OK and I think after all the testing I will play next week." He will be evaluated Monday.
Troy Polamalu, safety, Steelers: The star limped off the field after aggravating his strained right calf in the first quarter of a 16-14 win over the Eagles. The 2010 NFL Defensive Player of the Year watched the entire second quarter from a seat on the bench and did not move.
Matt Cassel, quarterback, Chiefs: He left with a head injury in the fourth quarter after getting hit by Baltimore's Haloti Ngata while attempting a pass. Cassel remained flat on his back for several minutes before getting helped up and walking off the field under his own power.
Javon Ringer, running back, Titans: He was injured with just over three minutes to play after