Is Kyle Shanahan the cure for the common QB?

Difference in Expected Points Added (EPA) per game with and without Kyle Shanahan as head coach, offensive coordinator or QB coach, for NFL quarterbacks who started at least 6 games in a season for Shanahan

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Averages are weighted by the harmonic mean of seasons spent in each scenario.

Chart: Neil PaineSource: Pro-Football-Reference, SportRadarCreated with Datawrapper