Stat: 14 turnovers
Not every entry on this list necessarily suggests "ridiculous" means "awesome" or "great." This entry indicates that "ridiculous" can also mean "bizarre."
Sure, there is some element of luck involved in defenses collecting turnovers: a careless throw by the quarterback or poor ball security from a runner. But great defenses still force turnovers, by fine coverage, pressuring the passer or hard hits.
The Steelers are obviously a great defense. In 2011, they have allowed the fewest yards through the air, fewest total yards and the second-fewest points.
Yet they've only forced 14 turnovers, tied for dead last in the NFL this year. Think about that: The Patriots—one of the most-maligned defenses in the NFL—have more than twice that number. The same is true for the Packers, who have 34 turnovers.
The Steelers are averaging less than one per game, and they've had seven games (four of which they won) without recording a single turnover. That should make their defensive ratings seem even more incredible.