St. Louis quarterback Marc Bulger left the team's 27-3 loss to Chicago in the first quarter on Sunday with a concussion and did not return. He suffered the concussion on a sack in the team's first offensive series. Rams' coach Jim Haslett believed that Bulger had improved by the end of the game, but his status is still uncertain for Week 13. "I thought he looked fine in the second half" Haslett said.