Playbooks

Flanker Drive out of Shotgun Doubles Offset lines up with trips-like spacing to one side and a single receiver to the boundary. The outside receiver on the near side runs a deep drive route across the field, the inside slot works a crossing route underneath heading the opposite direction, and the near backside receiver clears vertically up the numbers while the far outside receiver runs a shallow out breaking to the sideline, with the running back releasing to the flat as a checkdown. This is a zone beater built on horizontal high-low stretch concepts, with the deep drive route sitting behind the underneath crosser to attack Cover 4 and Cover 3 zone drops. The primary read progression starts with the drive route working across the middle, then works down to the underneath crosser sitting in the void, and finally checks to the flat route or the running back if the middle gets clogged.
Key the middle linebacker and hook zone defenders immediately after the snap, since they are responsible for the underneath crosser and drive route window. Watch for a user-controlled linebacker sitting in the throwing lane of the drive route, which is the biggest defensive answer to this concept in competitive play. Identify Cover 3 sink drops from the corners and safety, since a shallow flat defender undercutting the crossing route can jump the throw if the quarterback stares it down too long. Look for man coverage indicators like corners lined up tight to receivers with no safety help over the top, which forces the drive route into a contested throw against trail technique. Diagnose blitz packages pre-snap by checking linebacker depth and edge alignment, since a hot blitz can beat this play before the drive route develops if the running back is asked to release instead of block.
Use this play on second or third and medium when you expect a zone shell like Cover 4 or Cover 3, since the drive route is designed to split the safeties and linebackers.
Check the safety alignment pre snap. If you see two deep safeties sitting at 10-12 yards with no rotation, expect Cover 4 and lean on the drive route to work into the seam behind the linebackers.
If the defense shows man coverage with press corners, hot route the shallow crosser into a quicker option or check down to the running back in the flat rather than forcing the drive route into tight man coverage.
Pair this play with Curl Combo or X Dagger in your play-calling sequence, since both attack similar zone landmarks and keep the defense guessing between horizontal stretches and vertical shots.
Use play action or motion pre-snap from this same formation on earlier downs to bait linebackers into cheating up, then come back to Flanker Drive to let the drive route sit down in the vacated zone.