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Breakdown
HB Dive out of Singleback Doubles Flex is a pure downhill run play with the halfback taking a direct handoff and hitting the A gap behind the center and guards. The offensive line executes a straight double team and combo blocking scheme up front, aiming to create a vertical seam right at the point of attack, while the two outside receivers and slot receiver run off their defenders vertically to occupy the corners and hold safety depth. This is a run play with no play-action or RPO element attached, and the primary read is simply hitting the initial crease inside before bouncing if the A gap is clogged.
Defensive Reads
Watch for linebacker depth at the snap, since linebackers playing downhill and stacked tight to the line will fill the A gap quickly and kill this run before it develops. Identify if the defense is in a run blitz look with a linebacker or safety creeping into the box pre-snap, as this play has no answer built in in case of overload pressure up the middle. Check cornerback and safety alignment on the outside receivers, since if defenders are playing tight man coverage and crashing down on run support, the dive can still find room if the linebackers over-pursue. User-controlled defenders spying the A gap or mirroring the RB's initial steps will shut this down immediately, so avoid calling it into defenses that consistently show a spy or lurk defender in the middle of the field. Zone coverage shells with linebackers sitting in shallow zones rather than crashing downhill tend to open more room for this dive since the second level takes a beat longer to trigger on the run.
Usage Tips
Call this on early downs against base fronts where the defensive line shows a 4-3 or 3-4 with linebackers stacked tight to the box, since the dive thrives on movement created by double teams at the point of attack.
Use pre-snap motion or a quick glance at safety depth to confirm the defense is not selling out with an extra defender in the box, because a heavy box with 8 defenders will clog the single A gap read.
Hot route the fullback or TE into a lead block if the personnel allows, but since this diagram only shows the RB and OL involved, rely on timing the snap count to hit the hole before linebackers can flow.
Pair HB Dive with HB Draw and HB Power O in your play-calling sequence so linebackers cannot key run direction pre-snap based on formation alone.
Use this on short yardage or 2nd and short situations where defenses are more likely to sit in run-fit zone coverage rather than blitz, since a blitzing linebacker can beat the play to the hole.
