Playbooks

Breakdown

Empty Slot Under is an empty formation dropback pass out of Shotgun Trey Y-Flex that spreads five receivers across the field to stress every level of a zone or man shell. To the trips side, the outside receiver runs a deep go to clear space, the middle receiver breaks off a corner route, and the inner slot runs a shallow crosser (the under route) that cuts underneath the corner and go concept. To the boundary, the isolated receiver runs a slant that crosses the field into the vacated middle, while the nearest back or slot to the flat side runs a flat route. The primary read starts with the shallow crossing under route against zone drops, then works to the flat and slant combo on the backside if a defender bites on the deep shots, making this an effective man and zone beater depending on leverage.

Defensive Reads

Read the deep safeties first, since a single high safety often means the corner route or go route will draw a double team, opening the under route as the easy answer. Watch the flat defender and the underneath linebacker to the trips side, because if they widen with the flat route the shallow crosser will have a clean throwing lane over the middle. Identify blitz packages by counting defenders near the line before the snap, since empty formations with only five blockers get exposed quickly to overload blitzes off the edge. User linebackers sitting in a lurk technique in the shallow middle can jump the under route, so know when to check the ball down to the flat instead. Cover 3 shells with a hard flat defender can take away both the flat and the shallow crosser, forcing the quarterback to trust the deep corner route against a rotated safety.

Usage Tips

Check the defensive alignment before the snap and look for two high safeties, since that shell invites the go and corner combo to open up the under route underneath. Use motion or a hot route to adjust the flat route into a quicker option against blitz-heavy fronts that show five or six defenders near the line. Against man coverage, prioritize the under route crossing away from traffic since it creates natural separation off the corner and go clearing out the middle of the field. Pair this play with Empty Y Cross or Verticals in the same set to keep defenses guessing between crossing routes and vertical shots from the same empty look. This play works best on early downs or second and medium when you want a easy completion underneath while keeping deep shot potential alive if the defense sells out on the short routes.

Other Plays in Trey Y-Flex