Playbooks

FL Drag out of Shotgun Split Slot Offset sends the flanker on a shallow drag across the field, working left to right underneath the linebacker level, while the slot receiver releases vertically up the seam on a deep out breaking route to the corner of the field. The backside receiver runs a corner route away from the drag, giving the quarterback a three level stretch (shallow drag, deep out, corner) that clears out horizontal zone defenders. This is a zone beater concept designed to isolate the drag against Cover 3 and Cover 4 flat defenders, with the primary read starting on the drag underneath before working to the deep out breaking route if a zone defender sinks with it.
Pre-snap identify the depth of the underneath linebackers, since a shallow drag only works if there is a soft spot behind the first level defenders. Check safety alignment for two high shells, which typically signals Cover 2 or Cover 4 and opens up the deep out route as the second read once the drag is covered. Watch for a slot cornerback or linebacker sitting in the drag lane pre-snap, which tips a zone defender keying that route immediately at the snap. Post-snap key the flat defender on the drag side: if he sinks with the drag, look to the deep out breaking route for the window behind him. Beware disguised man coverage or a nano blitz look with linebackers crashing downhill, since the drag has no built in blocker help and can get blown up before the route develops.
Use this play on second and short to medium third down when you expect zone coverage from the defense. Pre-snap, check if the flat defender to the drag side is a linebacker or a corner, since linebackers struggle more to sink and cover the drag in space. If the defense shows Cover 2 or Cover 3 shell, hot route the backside corner route down to a curl to give yourself a quicker outlet against a deep half safety. Pair this play with Mtn Y Cross and Mtn Spot in your play calling sequence to attack the same underneath zones with different route timing, keeping linebackers guessing on drop depth. Against man coverage look elsewhere in the playbook since the drag has minimal natural rub or pick help built into this concept.