ATLANTA (AP) — Justin Fields stepped in to lead the Steelers to a 18-10 victory over the Atlanta Falcons with Russell Wilson’s Pittsburgh debut put on hold by a calf injury. He got a big assist from Chris Boswell’s strong right leg. Boswell booted six field goals, three of them longer than 50 yards, and the Steelers made life miserable for Kirk Cousins in his first game as Atlanta’s big-money quarterback. Boswell connected from 57, 56, 51, 44, 40 and 25 yards to account for all the Steelers’ scoring. Pittsburgh kept the play-calling close to the vest under new coordinator Arthur Smith, who was fired in January after three seasons as Atlanta’s head coach. Cousins passed for just 155 yards and was picked off twice in Raheem Morris’ first game as Falcons coach.