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When the Denver Broncos and the Detroit Lions face off Saturday night at Ford Feld in Detroit, it’ll be one team fighting to maintain their division lead (the 9-4 Lions), and another trying to make a dent in the postseason picture after a horrible start (the 7-6 Broncos).
And in this case, we’re talking about two defenses that have gone in decidedly different directions in the second half of the season. That’s a good thing in Denver’s case. The Broncos ranked dead last in Defensive DVOA in through Week 9, and they rank sixth since. It’s even better for Vance Joseph’s defense against the pass — a team that ranked 32nd in Pass Defense DVOA through Week 9 now ranks third.
In the Lions’ case, it’s no bueno. Detroit started the season ranked eighth in Defensive DVOA through the first nine weeks, and they rank 28th since. The Lions ranked eighth in Pass Defense DVOA in the first half of the season, and they’re stuck at 28th since.
How can two NFL defenses go so strongly in different directions so quickly? Let’s go under the hood.