Playbooks

DBL Post out of Singleback Ace Slot 12 personnel sends both the outer receiver and the inline TE/slot receiver on vertical post routes that break toward the middle of the field at different depths, creating a high-low read on the safeties. The remaining slot receiver runs a quick option route underneath to hold linebackers, while the running back releases on a shallow angle route out of the backfield as a checkdown against blitz pressure. This is a man beater and Cover 2 beater built to attack single-high and two-deep shells, with the primary read progression going deep post to shallow post to the backfield angle route if both posts are covered.
Pre-snap, identify single-high versus two-high safety alignment since Cover 2 and Cover 4 are the shells this concept is designed to punish. Watch the deep safety on the post side, if he stays flat footed reading run or gets caught peeking backfield, throw the outer post immediately. Key the underneath linebacker on the option route, if he sinks too deep into coverage the shallow post window opens up behind him. Post-snap, respect any user controlled safety playing a lurk or robber technique in the middle of the field, since that defender can undercut both post routes if he reads quarterback eyes early. Man coverage with no safety help over the top is the worst matchup for this play against the offense, since a clean man beater double post concept will win most reps versus press or trail technique.
Attack Cover 2 and Cover 4 shells where safeties have to choose which post to help on, since the double post concept forces one safety to be wrong.
Use pre-snap motion or a hard count to bait the safeties into showing their rotation before the snap so you know which post window will be open.
Hot route the option route into a deeper in-cut against zone heavy defenses to give yourself a true intermediate zone beater if the posts get jumped.
Pair this play with Verts or PA Verts earlier in a series so defenders start respecting vertical shots, then dial up DBL Post to hit the picture they already showed you.
Best called on 2nd and medium or 3rd and long when you need a explosive gain and the defense is more likely to sit in zone shells rather than bring pressure.