St. Louis ? A concussion will keep St. Louis Rams quarterback Marc Bulger out of Sunday’s game against the Atlanta Falcons. It’s just the latest in a series of setbacks for the injury-riddled team.

Bulger, who had been optimistic earlier in the week that he’d be back, was ruled out after failing medical tests. Bulger left in the first quarter of last week’s loss to the Seahawks after absorbing a blindside sack by Leroy Hill, although he stayed in the game for four more plays before throwing an interception on a shovel pass.

The Rams (2-9) have held him out of practice the last two days and elevated quarterback Brock Berlin from the practice squad to the active roster Wednesday, anticipating Bulger would be out this week.

Coach Scott Linehan said Bulger still was experiencing symptoms from the concussion, so the test failure did not come as a surprise.

“It’s just not clear when he’ll be ready,” Linehan said. “A week’s just too soon. Nothing too dramatic, but enough to where it’s probably not wise to consider playing him.”