Kareem Jackson's plight.
Previously, I had mentioned that Jackson was a victim of the two-receiver pattern quite a few times.
It involves a cover 3 scheme for the defense.
The receiver that KJ lined up on would run some sort of an inside route (whether a skinny post or a post route.)
The receiver (or TE) on the opposite side of the field (Quin covering) would run a crossing route through the middle.
The single safety in the middle can either step down on the crossing route or stay deep to help Jackson defend the inside route.
If the safety steps down too quickly, the QB would go long with nobody to man the middle.
Unless the other CB (Quin) quickly moves up top to take the place of the safety, Jackson becomes the goat.
The Texans actually did it right once, where Quin was about to collect an INT, only to have Nolan also got back and deflected the pass into the receiver's hands.