Last season the Cowboys brought in a defensive coordinator, Mike Nolan, whose defensive vision was to cause confusion to fool opposing quarterbacks with heavily disguised coverages in the secondary. Sadly, it had the opposite effect and confused the Cowboys secondary, and opposing quarterbacks were able to average 6.7 yards per attempt and throw for 34 touchdowns against an often out of position Cowboys secondary. It didn’t matter if they were a seasoned veteran or a rookie coming into the league, it was abundantly clear that what Nolan was doing wasn’t working.
The problem for Nolan was that it looked like he was trying to install too much in a COVID offseason, and the players weren’t able to retain all of that information which is what led to blown coverages time after time for the secondary.