The Zook years as defensive coordinator

Since the moderators at the Swamp Gas forums feel the need to muzzle debate about our former football coach I am posting what I wanted to post over there, over here.

We were talking about how Zook's track record, when analyzed closely, would lead anyone to conclude that his units got worse over time. I was able to post a comparison of his two years as the Defensive Coordinator of the Saints where I showed that the Saints defense regressed in almost every major statistical category. What I wasn't able to post before the thread was locked was the defensive perfomance of the Gators over the 3 seasons that he was Defensive Coordinator in Gainesville before Steve Spurrier demoted him. So here it is:

PPG:
91-13.8
92-22.8
93-19.8

Rushing TDs allowed:
91-7
92-17
93-9

Passing TDs allowed:
91-9
92-12
93-17

Rushing yards per game allowed:
91-100.3
92-156.6
93-111.2

Passing yards per game allowed
91-207.3
92-212.3
93-225.4

Total yards per game allowed
91-307.6
92-368.9
93-336.6

For a guy whose area of "expertise" was the secondary his defenses gave up more passing TDs and yards each successive year.

Now some might say that we can't judge the defense on stats alone. What kind of talent did the Gators have during those 3 years? But the fact is that everybody acknowledges that Ron Zook was the best recruiter on the staff. By 1993 (his 3rd year on the staff) one would think that he had brought in enough talent, at the positions he himself coached, to perform better than in 1991. Unless...

The man just can't coach.