Backed up deep in their own territory, their slow start to the season in danger of turning into a legitimate freefall, the Pittsburgh Steelers did what they always seem to do when things get tight. They relaxed. Ben Roethlisberger converted a pair of critical third downs during a remarkably patient 64-yard drive over the final 6:33 and Shaun Suisham drilled a 34-yard field goal as time expired to lift the Steelers to a 16-14 victory over the Philadelphia Eagles in the rain on Sunday.