Playbooks

Cover 4 Palms is a zone coverage shell out of the Nickel Over set that shows a quarters-style four deep, three under look with the two outside cornerbacks pressed at the numbers and the deep safeties reading the number two receivers. The diagram shows both outside defenders (CBs) sinking into deep quarter zones while the slot defenders and the nickel corner squeeze underneath routes with a hard flat and curl combo, and the middle linebacker spins down into a shallow zone drop to wall off crossers. This is a zone beater against smash and vertical stem combos, with the primary read being the trap read on the number two receiver to determine if the corner sinks deep or the safety rotates down to jump the flat.
Key the number two receiver immediately at the snap since Palms lives and dies on whether the corner sinks or the safety rotates down to take away the flat/out combo. This shell shuts down smash concepts, sail routes, and any flood concept that relies on the flat defender being outleveraged by a quick out route. Watch out for four vertical releases and deep crossing routes, since if all four receivers push vertically the underneath defenders can get stretched and the safeties have to work hard to stay on top. Post-snap, check the middle linebacker's zone drop depth. If he sits too shallow, quarterbacks can hit the seam route between the hashes before the safety can close. Beware of play-action rollouts and RPOs that attack the flat defender's run fit responsibilities, since Palms coverage defenders often have run support duties that can be exploited if the offense sells run first.
Pre-snap, identify if the offense is running two vertical stems from the slot since Palms is designed to trap the smash concept and jump the underneath out route from number two.
Watch for single high or two high safety alignment before the snap, then confirm post-snap that both safeties are rotating to their run/pass keys instead of staying static, which tells you if the offense is about to attack with a corner route.
User the flat defender on the trap read side to bait the quarterback into throwing the underneath out route, then jump it for a pick six opportunity against man beater concepts.
Pair this call with Cover 3 Match or Cover 6 Willie in your play-calling sequence so quarterbacks cannot key the safety rotation and settle into an easy rhythm throw.
Best used on second and long or third and medium situations where offenses are likely to run smash, flood, or sail concepts that this shell is built to trap.