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Breakdown
Mtn HB Lead Dive is a run play out of the Tight set in the Split T formation with 32 personnel, featuring a pre-snap motion tag that shifts the backfield look before the snap. The diagram shows the lead fullback stepping up through the hole to lead block on the second level while the halfback takes the handoff and follows straight downhill through the interior gap. This is a pure run concept, not a play-action look, and the line fires out low to create vertical push at the point of attack. The primary read is the fullback lead block: identify which linebacker he engages and take your cutback lane off his block, hitting the A or B gap based on how the defensive front flows.
Defensive Reads
Watch the middle linebacker depth pre-snap, if he is sitting shallow and square to the line he can beat the fullback's lead block and blow up the play at the mesh point. User the strong side linebacker or Mike and key the fullback's release, meeting him in the hole to prevent the lead block from creating a running lane. This play struggles against gap-sound run fits where defensive tackles hold their gaps and linebackers stay disciplined instead of flowing hard with the motion. Look for A-gap blitzes or run blitz packages that send an extra defender through the interior before the fullback can get to the second level, this stuffs the dive quickly. If the defense flows too hard toward the motion side pre-snap, user a linebacker to sit back and read the mesh point, since the cutback lane is the biggest weakness against undisciplined fronts.
Usage Tips
Use the motion tag to bait linebackers into flowing before the snap, which opens up cutback lanes if the defense overcommits to the motion side.
This play thrives against base 4-3 and 3-4 fronts where the fullback can find a clean lead block on the second level linebacker, so check pre-snap for light boxes or six or fewer defenders in the box.
Pair Mtn HB Lead Dive with Mtn PA Dive and Mtn HB Toss to keep defenders guessing off the same motion and formation look, forcing linebackers to respect multiple gap threats.
Best called on early downs (first and ten, second and short) when you want to establish tempo and force the defense to commit extra defenders to stop the run.
If the defense shows a stacked box or heavy blitz look pre-snap, consider audibling to HB Inside or FB Dive Weak instead since the lead blocker will have a tougher time sustaining against extra rushers.
