FLOWERY BRANCH — Falcons offensive coordinator Dirk Koetter says he's not too concerned about the recent struggles of his offensive line. Koetter believes Atlanta, which visits Baltimore for a preseason game on Thursday, still has enough time to settle on a starting right tackle and decide who fills backup jobs before the season opener Sept. 8 at New Orleans. Those moves will help determine if quarterback Matt Ryan, tight end Tony Gonzalez, running back Steven Jackson and receivers Julio Jones have the time and space needed to push the offense.