Let's take a look at his "vaunted" defense's overall rankings:
As DC in Jax, it ranked 19th, 15th, 24th and 25th.
As HC in Chicago it ranked 30th, 16th, 13th, 25th and 12th.
As DC In Detroit it ranked 20th.
Not once was his defense in the top 10.
Hmmm...yeah, I can see why he's considered a defensive guru.