Spagnuolo's Historical Defensive Improvements: Are They Real, or a Mirage?

What should we expect as the season shifts towards the playoffs?

During each year in the Steve Spagnuolo era in Kansas City, there seems to be some defined ebbs and flows with the Chiefs defense. It seems to start a bit slow, shows glimpses of peaks for parts of games, and eventually stiffens up and becomes more of a strength as December and January roll around. From 2019-2021, Spagnuolo’s defenses have largely follo…