Playbooks

Curl Switch out of Empty Trey Stack lines up five receivers wide with no running back, using route traffic to create natural picks against man coverage. The two-man stack to the left runs a switch release into a deep corner route and a shallow drag across the middle, while the trips side to the right stacks a deep crossing dig, a flat route, and an underneath curl that settles in the void. This is a man beater built on the switch release scrambling defensive assignments, with the primary read starting on the shallow drag or flat route against blitz looks before working up to the curl and dig if the pocket holds.
Watch for a single high safety pre-snap, which usually signals man coverage and opens up the switch release for a free access route off the stack. If linebackers show blitz depth at the snap, expect the shallow drag or flat route to be the quarterback's first answer, so user a linebacker into a shallow zone drop to jump that route. Cover 3 with a hard flat defender can take away the flat and curl combination, forcing the quarterback to hold the ball longer and look at the deeper corner or dig. Man coverage without a lurk defender in the middle is vulnerable to the drag route sitting in the vacated space, so spy the middle of the field with a linebacker if you are in man to erase that easy completion. Cover 2 shells with safeties sitting deep can bracket the corner route and dig, so if you see two safeties split evenly pre-snap, sit your underneath defenders on the curl and flat to force a checkdown.
Check the pre-snap alignment for man coverage indicators like tight press corners or a single high safety since the switch release at the stack is designed to confuse man defenders and create instant separation.
Hot route the shallow drag into a quick outlet if you see a blitz coming off the edge, since it clears fast and gives you a built-in answer against pressure.
Use this play on second and medium or third and short situations where the curl sitting down in the zone window becomes a reliable move-the-chains target.
Pair this with Levels or Y Stick from the same set to keep the defense guessing between switch releases and traditional route combos, forcing linebackers to respect multiple crossing patterns.
If the defense shows two high safeties, prioritize the dig route working across the middle since it attacks the seam between zone defenders before the safeties can rotate down.