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Breakdown

Curl Flats out of Shotgun Doubles Y-Flex is a classic zone beater built on the curl to flat stretch. Outside receivers sit down in curl windows around 10 to 12 yards while the running back and tightend work the flats underneath to attack the same side flat defender from two angles. This is a pure dropback pass with five in protection, no play-action or RPO elements, and the primary read progression starts with the curl route on the strong side, works down to the flat if the corner sinks with the curl, then moves to the backside curl or checkdown if the strong side is capped.

Defensive Reads

Read the strong side corner at the snap, if he sinks to take away the curl route the flat defender underneath should be uncovered for an easy pitch and catch Key the flat defender depth, if he widens with the running back or tightend release the curl route window opens up behind him Watch for Cover 3 sky or buzz rotations where the safety drops into the flat, this can jump your flat route and force you to reset to the backside curl Identify Mable or Cover 1 robber looks pre snap since a user spy or lurking linebacker sitting in the shallow zone can undercut the flat throw Man coverage with no underneath help, like Cover 0 or Cover 1 without a rat linebacker, gets exposed since the curl route breaks away from trailing corners and the flat is a simple leverage win

Usage Tips

Attack Cover 3 and Cover 4 shells since the flood of curl to flat stresses the outside third or quarter defender who cannot cover both levels

Use pre snap motion with the back to identify if the defense shifts into man or stays zone, if the linebacker follows the motion man you already know your flat route is open

Hot route the backside curl receiver into a dig or deeper curl against Cover 2 to sit in the hole between the corner and safety

Call this on second and medium to third and short since the high percentage flat and curl combo gives you an easy checkdown against most blitzes

Pair this with Curl Combo or Charger Y-Sail in your play calling sequence to keep the defense honest on the same curl flat stretch concept from different launch points

Against Cover 6 or split field coverage, key the strong side corner depth at the snap and throw the curl route hole shot before the safety rotates over