Playbooks

Not in any team playbook.
RPO Alert Bubble is a run/pass option out of Shotgun Ace Slot Offset that reads the alley defender to decide between handing off inside zone or pulling and throwing the bubble screen to the slot receiver. The diagram shows the outside receiver sitting into a quick bubble route behind the line of scrimmage while the offensive line executes zone run blocking, with the running back taking the handoff track through the interior gap. This is a numbers based RPO, not a straight man or zone beater, since the QB is reading box count and flowing defender leverage rather than a coverage shell, and the primary read progression is box defender count first, then the alley or slot defender's reaction to the bubble motion before deciding to pull and throw.
Check the box count pre-snap, light boxes with five or fewer defenders tell the QB to keep it on the ground and trust the zone blocking. Identify the alley defender or slot corner responsible for the bubble receiver, if he sits at a soft cushion and reads run first, the bubble throw is there for an easy gain. Watch for aggressive slot blitzes or nano blitz packages that send the overhang defender hard upfield, since this can disrupt the bubble throw window and force the QB to pull it down as a run. Look for zone shells like Cover 3 or Cover 4 with linebackers flowing hard to the run fake, this opens the perimeter bubble lane wide since underneath defenders vacate outside responsibility. Man coverage with a physical slot corner playing tight leverage can shut down the bubble read, forcing the offense to live on the interior run portion of this concept.
Count the defenders in the box before the snap and if there are six or more in the box, lean toward throwing the bubble immediately since the numbers favor the perimeter.
Watch the slot cornerback or overhang linebacker at the snap, if he crashes down on the run fake, snap throw the bubble before he can recover outside.
Use this play on early downs in run heavy personnel to keep defenses honest, then sequence it with Same Side Zone or Inside Zone from the same set so the defense cannot key run versus RPO based on formation alone.
Pair this call with RPO Zone Alert Bubble and RPO X Smoke later in a series so linebackers and slot defenders hesitate on every snap, opening up both the handoff and the screen consistently.
In short yardage or obvious run downs, this play still functions as a legitimate zone run, so do not be afraid to call it purely as inside zone if the pre-snap numbers do not favor the bubble.















