Playbooks

HB Blunt Dive out of Strong I H Tight Close is a downhill inside run with a straight dive blocking scheme up front. The offensive line blocks straight ahead to create a direct interior lane, the fullback leads through the hole, and the halfback takes the handoff and hits the gap immediately without any misdirection or stretch action. This is a pure gap run play, not a man or zone beater in the passing sense, and the primary read progression is a one cut, downhill decision based on which A or B gap opens first off the fullback's lead block.
Pre-snap, count the box defenders and check linebacker depth since a stacked box with linebackers sitting tight to the line signals they are ready to fill the dive gap immediately. Watch for a Mike linebacker or safety walked down into the box, which indicates a run blitz designed to beat this exact gap scheme. Post-snap, key the defensive tackles and any user-controlled defender shooting a gap penetration since a fast interior blitz can blow this play up before the fullback gets a clean lead block. This play struggles against odd fronts with a nose tackle at zero technique and heavy interior run commitment, so if you see that alignment pre-snap consider checking to an outside run instead. It beats light boxes and defenses that have rotated a safety out of the box into coverage, since fewer bodies inside means the initial dive crease stays open longer for the halfback to hit downhill.
Call this play on short yardage and goal line situations where you need a quick, decisive gap to pick up two to four yards against a stacked box.
Check the defensive front pre-snap and if you see extra defenders crashed inside or a heavy blitz look, consider audibling to Counter Weak or Power O from the same set to attack the edges instead.
Use the fullback's lead block as your key, press the hole quickly and trust the initial crease rather than trying to bounce it outside since this play has no lateral stretch built in.
Mix this in after running PA Slide, PA Power O, or Stutter Go's to keep linebackers honest, since the play-action looks off Strong I sell the same downhill dive action before turning into a pass.
Avoid calling this on third and long or in obvious passing situations since the lack of any pass option means a stuffed run puts you in a difficult down and distance.