Playbooks

Return Spacing lines up from Shotgun Bunch Str Offset in 11 personnel and sends the outside receiver in a return motion (red arrow) across the formation before the snap to help identify man versus zone coverage. At the snap, the bunch releases into a two-level spacing concept: one receiver settles at the sit route just past the sticks while the other climbs vertically before breaking outside, creating a natural high-low stretch on the flat and hook defenders. This is a classic Cover 3 and Cover 4 beater built to exploit the seams zone defenses leave underneath, with the primary read progressing from the shallow sit route to the corner breaking route based on how the flat defender reacts.
Pre-snap, key the cornerback aligned over the bunch, if he shuffles with the return motion receiver across the formation it signals man coverage and you should jump the underneath sit route immediately. Watch the flat defender's depth at the snap, if he sits shallow to take away the sit route the corner breaking route behind him should be wide open in Cover 3. Identify the strong safety rotation post-snap, a two-high shell staying split indicates Cover 4 while rotation to single high signals Cover 3, both of which this spacing concept is designed to attack. Be alert for a user-controlled defender lurking in the underneath zone since spacing concepts are vulnerable to a rover sitting in the throwing lane between the sit route and the corner route. Man coverage with press corners and a blitz behind it is the biggest threat, since the spacing routes need time to separate and a free rusher can force an early throw.
Use the pre-snap return motion to distinguish man from zone before you even hike the ball, if the defender follows the motion man across the formation you know to attack leverage instead of zone windows.
Against zone shells like Cover 3 or Cover 4, work the spacing concept from the sit route out to the corner breaking route, letting the flat defender declare before pulling the trigger.
This play shines on third and short to medium situations where the sit route sitting just past the sticks gives an easy conversion throw against zone drops.
Pair this with Return RPO Flat or Return RPO Alert Flat from the same set to keep defenses honest, since the run action and pass concept both use the identical bunch offset alignment.
If the defense shows heavy blitz pre-snap, hot route the shallow crosser into a quick option route to beat man pressure before the spacing concept has time to develop.