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Quick Reference
Not in any team playbook.
Breakdown
Mtn Inside Zone Split is an inside zone run play out of Singleback Wing Flex Close with 12 personnel, and the diagram shows a pre-snap motion man crossing the formation before the snap to shift the box numbers. The offensive line flows laterally with zone blocking steps, reading the frontside gaps before working to the second level, while the HB takes the handoff and presses the line looking to find a crease based on the flow of the defenders. This is a pure run play with no route combo shown, and the primary read progression for the ball carrier starts frontside at the play side gap, then bends backside if the defensive front flows hard to the motion or the play call direction.
Defensive Reads
Watch the motion man pre-snap, if a linebacker or defensive back follows him across the formation it confirms man coverage and the box count changes in your favor. Key the play side defensive end and 3-technique, if they crash down hard on the zone action it opens the backside cutback lane for the HB. This play struggles against gap or bear fronts with extra defenders stacked on the line, since zone blockers can get overwhelmed at the point of attack. Look for linebacker depth at the snap, shallow linebackers who are quick to fill downhill can blow up the zone read before the HB gets to the second level. Beware of a user-controlled defender spying the HB from depth, since a heads up user flow player can sit on the cutback and erase the backside crease.
Usage Tips
Use the pre-snap motion to identify if the defense is playing man or zone based on whether a defender follows the motion man across the formation.
Call this on early downs in normal run support fronts, ideally first or second down inside your own territory or in four minute offense to control tempo.
If the defense shows a stacked box with extra defenders creeping down, consider hot routing the fullback or extra TE into a lead block adjustment instead of forcing the zone read.
Pair this play with Mtn HB Stretch or Mtn HB Stretch Wk in the same set so the defense has to respect both inside zone and outside zone tendencies from identical formation and motion looks.
Sequence this play after Mtn PA Boot Cross Y-Corner or Mtn PA Boot Corner from the same set so linebackers stay honest on run fits instead of jumping the play-action fakes.
