Playbooks

Breakdown

Cover 4 Quarters is a four deep, three under zone shell out of the Nickel 4-2-5 personnel in the Over set. The diagram shows both outside corners and the two safeties dropping to deep quarter landmarks while the two remaining underneath defenders sit at intermediate depth to wall off in-cuts and curl areas, with no blitz shown and a clean four man rush look implied by the lack of pressure arrows on the defensive line. This is a zone based coverage designed to defend vertical shots and four verticals concepts by putting a deep defender on every vertical threat, so the primary read progression for the defense is to identify the number two receiver's release first (safety keys on him to decide between MOFC help or run support) before working outside to the number one receiver's vertical stem.

Defensive Reads

Watch the number two receiver's release immediately off the snap, a vertical stem tells the safety to stay deep while an in breaking release opens him up for a robber or run fit. This shell is vulnerable to option routes and quick game concepts like hitches and slants that settle in the soft spots between the underneath defenders and the deep quarter defenders. Man beater concepts with rub or pick routes can stress the corner's outside leverage in their deep quarter zone, so user the corner if you suspect a smash or fade beater. Look for offenses attacking the seams with two receiver seam concepts against the safety's quarter zone, since that is the classic four verticals answer to this coverage. Post-snap, if the running back leaks out on a wheel or angle route, the underneath defenders must widen quickly or this coverage surrenders easy yards against check release RPO looks.

Usage Tips

Call this when you expect the offense to run four verticals or deep dagger concepts, since the quarters shell has a deep defender assigned to every vertical route.

Pre-snap, check the offensive formation for stacked or bunch receivers, since those alignments can create natural picks against your corners and safeties in their zone drops.

Use the safety's read on the number two receiver to diagnose run versus pass quickly, this play doubles as solid run support against Nickel Over run schemes if the safeties trigger downhill fast.

Mix this in after showing Cover 3 Sky or Cover 2 Match on early downs so the offense cannot key your shell from pre-snap safety depth alone.

Pair with Cover 4 Palms or Cover 4 Drop Field on second and third down to keep quarterbacks guessing between quarters variations that handle number two vertical releases differently.

Other Plays in Over