St. Louis Rams' quarterback Marc Bulger suffered a concussion in Sunday's 24-19 loss to Seattle, and Coach Scott Linehan said it was too early to know if he'll be available for next week's game against Atlanta. Bulger left after making a shovel pass midway through the first quarter. He was hit by several players but threw a pass that was intercepted by defensive end Patrick Kerney. However, Linehan said Bulger was initially hurt on the Rams' first possession on a blindside sack by linebacker Leroy Hill. "He didn't seem quite right on the sidelines," Linehan said. "We talked a little bit, and I could tell by looking at him right when he walked off that something was different." "He mentioned that he didn't feel good, and that is a big concern. He said he was starting to feel nauseous." Bulger, who missed two games earlier this season with broken ribs, walked on his own to the locker room. He was replaced by Gus Frerotte.