The Broncos that year clinched the #1 seed in the AFC after just 13 games and didn't seem to know how to handle the last 3 games. They treated the game at GB like a preseason game and infamously lost 41-6, and their performance here was nowhere near the standard they'd set for themselves all season despite the starters playing. Instead of trying to refocus in the last game at San Diego they went preseason mode in that one as well and lost, and as we all know they couldn't flip the switch back on for the Jacksonville game in the Divisional round.