Playbooks
HB Dive out of Singleback U Off Close 12 personnel is a downhill interior run play that sends the halfback straight through the A or B gap behind the center and guard double team. The blocking scheme is a simple gap concept with the fullback replaced by a second tight end who can chip inside or help seal the edge, and both TEs give you extra beef at the point of attack against base fronts. This is a pure run play with no play-action or RPO tag, so the primary read for the ball carrier is to press the initial hole and read the mike linebacker's fill before bending to the cutback lane if the front is stacked.
Read the mike linebacker's alignment first, if he is stacked directly over center expect immediate fill and a quick decision to bounce the run outside. Watch for safety rotation down into the box pre-snap, a single high safety with both corners playing tight usually means run support is heavy and you should consider audibling to a play-action shot instead. Identify nano blitz packages where the defensive line slants hard to one gap, since HB Dive can get stopped for a loss if the guard loses his double team rep against a shaded three technique. This run beats base 4-3 and 3-4 fronts that stay static and light boxes vulnerable to a straight downhill hit, but it struggles against overload run blitzes and eight man fronts where extra defenders crash both A gaps. Post-snap, key the user controlled linebacker's flow, if he bites hard on the initial mesh point the cutback lane opens up behind the backside guard.
Use HB Dive on early downs when the defense shows a light box with six or fewer defenders inside the tackles, since the extra TE numbers advantage only pays off if the front isn't loaded.
Check for a walked up strong safety or nickel defender cheating into the box pre-snap, that usually signals run blitz or a nano blitz look that can blow up the dive before the mesh point.
Pair this with PA Deep Cross or PA Z Swirl out of the same formation and personnel so the defense sees identical alignment and has to respect both the run fake and the play-action shot off it.
On third and short or goal line situations, HB Dive punishes defenses that sub out for pass coverage personnel since the extra gap blocker in 12 personnel wins the numbers battle up front.
Hot route the backside TE into a quick flat or seal block if you see edge pressure showing pre-snap, this keeps outside contain from crashing the dive lane.