Playbooks

Curl Flats out of Singleback Doubles shows a two by two receiver set with the true HB releasing into a flat route on one side to complement the outside receiver curl on that same side, while the backside receiver runs a matching curl over the shallow out from the slot. The X receiver on the far side has a curl route with an out breaking underneath route, creating a high low stretch to both edges of the field. The primary read progression starts with the curl to flat combo on the strong side, working from the curl route down to the flat route if the underneath defender sits, then flows to the backside curl if the playside window closes. This is a classic zone beater built to attack Cover 2 and Cover 3 flat defenders and hook zone linebackers with layered depth.
Pre-snap, identify whether the defense is showing a two high safety shell or a single high look, since Cover 2 and Cover 3 flat zone drops are exactly what this concept is designed to exploit. Watch the depth of the linebackers at the snap. If they sink quickly into hook zones, the curl routes will have a tighter window and you need to anticipate the throw rather than wait for full separation. Beware of Cover 4 or Cover 6 shells with disciplined flat defenders, since a well timed zone drop directly under the curl route can bait an interception if you force the throw. Against man coverage, look for a User controlled linebacker or safety lurking in the shallow flat, as this concept relies on natural spacing that man coverage with underneath help can disrupt. Blitz packages that bring pressure off the edge can collapse the pocket before the curl fully develops, so account for a quick check to the flat route as a built in blitz beater against aggressive nano blitz packages.
Use this play on third and medium situations where the sticks fall between five and eight yards, since both curl routes settle in that exact range.
Check the flat defender pre-snap. If the corner or linebacker is sitting low in the flat, the curl behind him will be wide open against Cover 2 and Cover 3 shells.
Hot route the running back out of the backfield into a check release if you diagnose a blitz, since the flat route from the HB alignment is friendly leverage against man coverage but exposed if the defense brings extra rushers.
Pair this play with Flanker Drag or Y Shallow Cross in your play calling sequence to give the defense a horizontal stretch look before hitting them with the vertical curl windows.
Against man coverage, target the curl to the side with a favorable matchup and use the flat route as a quick outlet if you see a User controlled defender jumping the curl.






















































