From an excellent interview Texas’s defensive coordinator did with LonghornDigest.com:
But statistics were also changing for in-game analysis. Whereas it might once be considered an advanced metric to look at red zone efficiency, Diaz said Texas is focused on red zone touchdown efficiency.
“You can win a national championship by making people kick field goals in the red zone,” Diaz said. “And you can finish last, in theory, in red zone defense. It just doesn’t make sense.”
That phenomenon has given rise to statistics like Slow Grind — the number of plays a defense forces an offense to take to score — and the FootballOutsiders.com S&P+ Ratings, a play-by-play success rate that factors for situation and competition. Looking at the latter rating, you can see Diaz’s 2011 Texas defense come to life through the numbers. The Longhorns finished No. 4 nationally in the statistic, but were especially good on running plays — a major Diaz focus — and on winning passing situations (defined as second down with eight or more yards to go, or third or fourth down with five or more yards to go). Texas was third nationally in Rushing S&P+, and second only to national champion Alabama in Passing Downs S&P+.
“Those are the tenets of our defense,” said Diaz, who follows both S&P+ and Slow Grind. “We’ll show those kinds of things to our players during the season just to reinforce what we already know. There aren’t usually any ‘eureka’ moments, but it works more side-by-side with what we see on film.”