Playbooks

Not in any team playbook.
Cover 6 out of the 3-3 Over Nickel is a split field zone shell that pairs quarters coverage to one side with a 2-man deep half rotation to the other, giving you a hybrid look that adapts to trips and 2x2 alignments. Off the diagram, the two outside defenders on the boundary side sink into deep thirds while the underneath zone defenders (yellow and teal) squat on short and intermediate hooks and curls, and the purple defender to the left flows out to the flat or matches a check release. This is a zone beater killer against man concepts and also holds up well versus quick game since it disguises which side is playing quarters versus 2 deep, forcing the quarterback to identify the boundary and field rotation before committing to a throw. Primary read progression starts with the deep half safety alignment to diagnose which side is quarters and which side is playing 2, then works from the flat defender to the hook/curl defender underneath.
Watch the receiver alignment pre snap to identify if the offense is running trips or 2x2, since that dictates which side of the field gets quarters coverage and which side rolls to 2 deep halves. Post snap, key the underneath yellow zone defenders since they are responsible for sitting in hook and curl windows, and any late break by the quarterback into those zones should trigger an immediate jump on the route. This shell is strong against man beater double moves and deep comebacks since the split coverage disguises rotation, but it can be exposed by quick slants and stick concepts if your underneath defenders drop too deep too fast. Look for the purple flat defender's leverage on running backs and check releases, since offenses will try to attack the flat with a quick swing or flare route if that defender widens too far. Beware of trips formations stacking three receivers to one side, since that can overload the quarters side of the coverage and create natural picks or rubs against your underneath defenders.
Pre snap, check safety depth and alignment to figure out which side is getting quarters treatment and which side is rolling to 2 deep halves, since that determines your leverage defender in the flat.
Use this call on early downs or third and medium when you expect balanced route concepts, since the split field shell adapts well to both run and pass without heavy blitz risk.
User the underneath hook or curl defender (yellow zone) to jump in-cuts and shallow crossers, since offenses will try to sit receivers right in that window against zone.
Pair this play with a straight Cover 4 Quarters or Cover 3 Match call to disguise your shell post snap, forcing the quarterback to guess between two-deep and split-field rotation.
Avoid calling this into aggressive four verticals concepts against trips formations unless you have practiced sinking your deep defenders quickly, since the seams can stretch the underneath zone defenders.





































