The coordinators, by what they inherited — and what they built.
Same question as the head coaches, one level down: was the unit already strong when they got there, or did they build it? FBS-relative, 187 qualifying OC stints and 205 DC stints, 3+ seasons each, 2014–present.
Every qualifying coordinator, inherited vs. built
buildersinheritors/sustainersdeclinesactive
Who tore it down
The mirror of the builders — ranked by the most percentile-points a unit lost under a coordinator, against what it was the season before they arrived.