ATLANTA — Giovani Bernard scored in his opening bid for a share of the Bengals' carries, while Steven Jackson was provided little running room by the Falcons' depleted offensive line as Cincinnati rolled to a 34-10 preseason win over Atlanta on Thursday night. Josh Johnson, who directed two second-quarter touchdown drives, made big plays as a passer and runner as he opened the competition for the Bengals' backup quarterback job. Bernard, a second-round pick from North Carolina, played behind returning starter Benjarvus Green-Ellis and had 10 carries for 28 yards, including a 1-yard touchdown run.