We Aren't Blowing It Up, So What Now?

We had mostly the same edge players with a top run defense. As well as great pass defense.
Letting onyemata out building hurt, as well Malcolm roach.
Our defense is biggest problem is being out of gas, having to be on field too much with little recuperation time.
Biggest problem with aging, and much of our defense long in the tooth. Is it takes longer to recuperate.