I had to break out the laptop to do this, but Heacock's defenses at ISU were traditionally good against the run. I used the official Defensive Yards Per Carry to help normalize against teams that run a lot vs a little. In his 10 seasons as DC:
- Nationally:
- We were in the top half nationally seven times.
- We were in the Top 25 four times.
- We were in the Top 10 three times.
- Big 12:
- We were in the Top 3 six times.
- We were the Top Big 12 Defensive YPC team three times.
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I don't think you can argue that the 3-3-5 is "inherently flawed" against the run. Even though
some of the Big 12 was "air-raid-ish" during that period, a lot of those teams were still good at running the ball and counted on explosive plays from the running game. Baylor, Texas Tech and TCU all had good running games during this period. K-State is K-State. OSU had some really good running backs during that span.
Looking at these trends, you could argue that people had "figured it out" the last couple years, but then you'd also have to argue that the crazy injury rates the last couple years didn't have an impact.