True but then you can't give an NFL QB time to sit there and scan the field he will find an open man I don't care who your CB are. These WR and QB are too damn skilled to be given time to make plays.
There is no doubt that is the case.
But a good CB can cover longer than a lesser CB.
A solid safety can take away things a poor safety can not.
There is no exact equation but pass coverage is a cumulative job. It starts with the actual coverage itself because no sack occurs instantaneously.
Once you provide some coverage how good that coverage needs ot be our how it needs to last is determined by the pass rush.
No matter how good a pass rush is, a QB can ALWAYS get a pass off if the coverage is non-existent.
On a 3 step drop the DL has little to no effect ever unless they dont rush at all and instead just try to jump up in the passing lane.
Same for a post pattern where you have the defense in all the right spots but the ball is just thrown up and a WR runs 15 yards with the ball in air and takes the pass away from the defense.
Now when Carr is asked to cover a WR1 across the entire field on a 20 yard crossing route that's a pressure issue.
But the simple truth is people are using the pass rush(which was bad but not awful) as a scapegoat for truly terrible pass coverage in 2013 when our safety and LB coverage was BY FAR the worst in the NFL.
I think this is for two reasons:
1) People want to go DL in R1. --so do I.
2) People want to draft OL/DL over skill. --generally smart.
But the truth is where we graded out the most poorly last year isn't even debatable. It was in our coverage metrics which set historic lows.
If you put Seattle's 2013 LB and secondary with our 2013 DL that teams easily wins the NFCE.
If you put our secondary and LB with that Seattle DL we 'probably' win the NFCE.
Hatcher, Selvie, Hayden and Ware are a middle of the road NFL DL. We obviously had zero depth but that's 65m that just left in Hatcher and Ware.
If we cut all our safeties and LB not named Sean Lee they might get 10m total.