Playbooks
HB Lead Dive out of the Maryland I in the Heavy formation is a downhill interior run play built for smash-mouth football. The blocking scheme sends the lead fullback through the hole first to seal off the first alpha defender at the point of attack, typically a linebacker or safety filling downhill, while the offensive line executes a straight-ahead gap scheme to move bodies vertically. This is a base run play with no play-action or RPO component, and the primary read progression is simple: get downhill fast, key the fullback's block, and choose the cutback lane based on which side the interior defenders overcommit to.
Look for base 4-3 or 3-4 fronts with linebackers stacked tight to the line, this alignment tells you the defense expects a downhill run and will try to win with numbers, but your fullback lead block is designed to counter that exact look. Watch for safety alignment before the snap, if a safety is creeping down into the box pre-snap that is a strong indicator of a run blitz or contain look on that side, so plan your cutback lane opposite the safety's rotation. Post-snap, key whether the user is controlling the Mike linebacker and shooting a gap immediately, since a well timed A-gap or B-gap blitz can blow up this play before the fullback gets a clean angle. This play struggles against penetrating 46 or Bear fronts with defensive tackles shaded into double gaps, since the interior offensive line loses leverage before the fullback can seal anyone. Watch linebacker flow post-snap, if they are flowing hard to the play side call, look for a natural cutback lane on the backside since overpursuit against Maryland I heavy sets is common at the linebacker level.
Use this play on short yardage and goal line situations where you need a physical, high-percentage gain against defenses stacking the box. Pre-snap, check the linebacker depth and alignment, if the Mike and Sam are sitting shallow and crowding the line of scrimmage, this play still works because your fullback lead blocker is designed to erase that exact threat. Combine HB Lead Dive with Power O and PA Power O in the same drive to keep defenses guessing between gap schemes and misdirection, forcing linebackers to hesitate on their run fits. If you see a defense selling out with an 8 or 9 man box, consider setting up QB Sneak on short yardage downs instead, then come back to Lead Dive once the box count drops. Use manual control on your fullback in critical short yardage moments to pick the exact defender you want sealed, especially against a stacked Mike linebacker or a blitzing safety.