Playbooks
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Quick Reference
Not in any team playbook.
Breakdown
RPO Alert Bubble out of Shotgun Trio Y-Flex is a run-pass option built off an inside zone action to the HB. The read key is the flexed slot receiver's bubble screen to the boundary, with the outside receiver on that side running a shallow crossing route underneath to occupy the flat defender and give the QB a clean throwing lane. On the backside, the X receiver climbs vertically then breaks to a comeback at the top of the route, giving the QB a full field alert if the box count and perimeter numbers dictate a pass over the give. Primary progression is bubble screen first if the slot defender sits inside or bites on run action, then reset to the backside comeback if the alert side is covered, with inside zone as the true handoff if the box is light.
Defensive Reads
Pre-snap, identify if the slot cornerback or nickel is aligned outside the bubble receiver with depth, since tight outside leverage kills the bubble read instantly. Watch linebacker depth at the snap, if they crash hard downhill on the zone fake, that is the trigger for the QB to pull and throw bubble, so as the defense you need a linebacker with contain discipline or a spy on the RPO run key. Man coverage on the backside X leaves the comeback vulnerable if the corner bites on the vertical stem, so off coverage with a squat technique at the top of the route is the counter. Zone shells like Cover 3 or Cover 4 that keep a flat defender sitting on the bubble neutralize this concept completely, forcing the QB to either give the ball or force the comeback into a zone defender's face. User the slot defender manually to jump the bubble route rather than relying on AI, since the CPU flat defender often bites on the run fake and opens the screen.
Usage Tips
Check the numbers to the bubble side before the snap, if the defense has two or fewer defenders accounting for the flat and slot receiver, pull it and throw the bubble immediately. Use this on early downs when defenses are stacking the box to stop inside zone, since the RPO mechanic punishes overaggressive linebacker fits. If the corner on the alert side is playing off man or soft zone, the backside comeback route becomes the higher percentage throw over the bubble, so learn to flick the read stick or manually key that WR early. Pair this with straight Inside Zone from the same formation to condition the defense into crashing down, then hit them with this RPO once you see linebacker over-pursuit on tape. Third and short is a prime situation since the bubble alone can pick up the sticks against man coverage that leaves the flat uncovered.
