Again, he had one good year (2002), and that was much more due to the players already being well coached and experienced. The next year, we went from 9th in the nation on defense to 53rd.
At Washington, his defenses ranked 91th in 2005, 85th in 2006, and 93rd in 2007.
Once he became a DC again...
2013 Colorado: defense ranked 105th out of 125 teams
2014 Colorado: defense ranked 99th out of 128 teams
2015 UNLV: 100th out of 128 teams
2016 UNLV: 112th out of 128 teams
2017 UNLV: 93rd out of 130 teams
By the time he had left Notre Dame, every team already knew how to defeat his defensive strategy.