They happen relatively rarely (especially for DT's). What is the impact of your DL on every play where they're not getting a sack?
Check out this article for more insight: [
www.profootballfocus.com]
"Aaron Donald led all interior defenders with 82 total pressures this season, a mark that tied for third overall in the NFL. He may have recorded “only” eight sacks, but nobody was better at generating consistent, impactful pressure than Donald, especially when you consider the position he was playing."
"Of course, not all pressure is created equal, and raw numbers can sometimes mislead. Pressure can take the form of a sack after a defender beats a double-team in under two seconds, a clean-up pressure where the QB is forced to move into a pass-rusher’s leverage, or from a defender having an unblocked path straight to the QB.
Where Donald really separates himself from the pack is in how his pressure comes about. He generated decisive pressure (graded at +1.0 or better in PFF’s incremental, play-by-play grading scale) once every 8.7 rushes. That figure would be the third-best rate of pressure among interior defenders, and it’s only counting Donald’s most impactful pressures."