Hafley is asking a lot from the DL, a snippet below from a Jason Wilde article
They put it behind a paywall, so no link.
"...It also means that, because of the amount of effort Hafley demands the big fellas up front exert, you’ll see more frequent substitutions to keep guys fresh.
“With this system, you’ve got to play like that. You can't be out there like six snaps in a row and exert that much energy and make an impact on this defense,” veteran Pro Bowl defensive tackle Kenny Clark said.
“With this defense, you’ve got to be able to go and really get off the ball and give that energy and that effort every single play. So, we’ll definitely be rotating a lot this season.”
Keep that in mind when filling out your 53's