Rams quarterback Sam Bradford believes mental letdowns are to blame for the team's lack of offensive production. He once thought it might have been new offensive coordinator Josh McDaniels' system, but not now. "At this point, I think to use that as an excuse or reason for our struggles, I don't think that's right," Bradford said. "As much as I hate to say that, I think it's a lack of concentration once we get down there. Some of the mistakes that we do make down there, there's no reason for them, and we've got to find a way to eliminate those." St. Louis and Seattle are tied for the fewest trips inside the 20 at 18 apiece and the Rams are last in the NFC with seven red zone touchdowns.