Although there have certainly been stretches in which they haven’t played terribly well so far this season, I don’t know how much serious adversity the Pittsburgh Steelers have faced in-game so far this year en route to their 7-0 record. They have had injuries and things like that, and have had first-half deficits to overcome, but before Sunday, they only had to come back in one game.
They trailed the Baltimore Ravens 17-7 at halftime, and those seven points came from the defense. The offense only managed to run 20 total plays, and they certainly did not move the ball very much.