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Quick Reference
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Breakdown
RPO Glance Post out of Shotgun Y Off Trips gives the quarterback a run-pass option read tied to the trips side while a backside receiver runs a vertical post as the alert throw. The diagram shows the trips slot receiver running a short out and up (flat breaking upfield) as the run alert conflict defender read, while the backside isolated receiver runs a glance post that stems inside and attacks the deep middle. The offensive line and running back execute an inside zone blocking scheme underneath, giving the quarterback a true give, throw the bubble/flat conflict route, or hit the post based on the second level defender's run fit. Primary progression is run key first (read the alert defender on the trips side), then glance post on the backside if the safety bites down or the coverage opens up the middle.
Defensive Reads
Watch the backside safety pre-snap, if he is aligned shallow or shows run support tendencies, the glance post is live and should be your first look after the snap. Key the second level defender assigned to the run fit conflict, if he sits and reads run first, take the handoff, if he crashes hard, pull and throw off the conflict route. Cover 3 and single high shells with aggressive linebackers are the most vulnerable since the post attacks the vacated deep middle. Two high safety shells (Cover 2, Cover 4) shut this down more easily since there is help over the top on the post, favor the run or the flat conflict route in these looks. Post snap, if you see a user controlled defender flying downhill on the run action, that is your green light to pull and let the post eat, but if he stays disciplined in his zone drop, take the check down or handoff instead.
Usage Tips
Pre-snap, identify whether the defense is showing single high or two high safeties, since the glance post window only opens if that backside safety cheats toward the trips formation or bites on run action.
Use the RPO read key (usually a linebacker or slot defender) to decide between the handoff and the post throw, do not force the post if that key sits flat footed.
Hot route the flat runner into a deeper option route against teams that consistently crash down on the run fit, this manipulates the conflict defender further and opens the glance post window longer.
Call this on early downs (1st and 2nd and short to medium) when defenses are geared to stop the run, since that is exactly when the glance post hits behind a crashing safety.
Pair this with RPO Duo Alert Glance or RPO Counter Glance Post later in a series so the defense sees similar run action and hesitates, making the post throw window bigger on repeat calls.
