Playbooks

Curls out of Pistol Y Off Trips is a classic zone beater built on curl and flat combinations. The backside X runs a curl at roughly 12 yards while the RB releases into the backside flat, giving you a natural high-low read against zone drops. To the trips side the outside receiver runs a deep vertical clear-out (drawn in red) while the inside slot works a curl and the TE/Y runs a quick out breaking away from the formation, stretching zone defenders horizontally and vertically. Primary read progression starts with the trips side curl, works to the flat/out combo underneath if linebackers sink deep, and comes back to the backside curl and flat if the defense rotates away from trips.
Pre-snap, identify the safety alignment: two high safeties signal zone drops that this play exploits, while a single high safety often means man coverage that requires hot routing the curls. Watch linebacker depth at the snap. If linebackers sink hard to cover the curls, the flat route from the RB and the out from the Y become wide open for quick completions. Beware of Cover 3 sky or Cover 4 quarters shells with a user-controlled lurking linebacker or nickel defender sitting in the curl-to-flat window, since that defender can jump the throw if the quarterback stares down the receiver. Man coverage with an aggressive blitz package is the biggest threat, since the curl routes need time to develop and a delayed hot read to the flat or a quick checkdown is necessary against pressure. Post-snap, key on the corner over the deep vertical clear-out route. If he bails immediately into a deep zone drop, that confirms zone coverage and the curls will sit down in soft spots for an easy pitch and catch.
Diagnose the coverage shell before the snap by checking safety depth: two deep safeties usually means Cover 2 or Cover 4 zone, which this concept is built to punish with the curl sitting in the soft spot between the flat and deep defenders.
Use the deep vertical route on the trips side as a clear-out to occupy the corner and safety, opening up the curl and out combo underneath for easy completions against Cover 3 or Cover 2.
If you see man coverage indicators like a single high safety with tight corner alignment, hot route the curls into speed outs or slants to prevent defenders from sitting on the route breaks.
Call this on second and medium or third and short situations where the underneath completions from the curls and outs will convert the down without needing to push the ball deep.
Pair this play with Four Verticals or Mtn Seam Y Z-Choice earlier in the drive so defenses respect the vertical shots, which opens up the curl windows even more against zone coverage.