It is not that often that the Pittsburgh Steelers can have quarterback Ben Roethlisberger throw just 18 passes and still handily win that game. At least, it’s not often anymore. Roethlisberger has thrown 20 passes or fewer on 27 occasions over the course of his career, but the vast majority of them are limited to early in his tenure.
And it is not often not because it has been rare for the Steelers to win such games, but rather because it simply doesn’t happen very often. Of course, you can deduce that the Steelers have required Roethlisberger to throw the ball more often in recent years in order for the team to win said games, resulting in him very rarely throwing so few passes.