Playbooks

Y Lead Read Opt Rt is a read option run play out of Shotgun Slot Left with 11 personnel, and the diagram shows a tight zone read look with the QB and HB mesh point crossing behind the line. The offensive line blocks down to the play side while the Y (TE) leads through the hole as a lead blocker on the read option path, and there is no route concept shown beyond the option mesh, confirming this is a run play rather than a play-action or RPO. The primary read progression starts with the QB reading the play side defensive end to decide keep or give, then reading the Y lead blocker's path to find the crease.
Watch the play side defensive end pre-snap, if he is crashing hard toward the mesh every play the offense will start pulling the ball for the QB keep, so play contain and stay disciplined on your edge assignment. Key the Y (TE) release at the snap, since his lead block path tells you exactly where the offense wants to create the cutback lane. Stacked boxes with an extra linebacker or safety near the line shut this down fast because it eliminates the alley the lead blocker is trying to open. User a linebacker to spy the mesh point and squeeze the option lanes rather than committing to one gap, this forces a late decision from the QB and increases the chance of a negative play. Look for late safety rotation into the box on early downs, since defenses expecting run tendencies from Shotgun Slot Left will often sneak a safety down to outnumber the read option blocking scheme.
Use pre-snap motion or a quick glance at the defensive end alignment to confirm he is a true read option key and not crashing hard down the line every snap.
Call this on early downs or short yardage third downs where the defense is stacked to stop the pass, since heavy boxes with extra defenders near the line create bigger cutback lanes for the Y lead blocker.
If the CPU or user defender consistently sits on the mesh point, hot route the Y to adjust his lead block angle or pull him into a lead block on the backside to counter aggressive edge crash.
Pair this with Speed Option and HB Dive from the same set to keep the defensive front guessing between different mesh point timings and edge threats.
Avoid calling this into heavy blitz looks with extra defenders stacked in the box pre-snap, since the QB keep lane gets clogged fast against nano blitz packages.