Playbooks

Mtn PA HB Seam is a play-action pass out of Shotgun Split Y Off with 21 personnel that sells run action before releasing the HB up the seam. Off the play fake, two outside receivers or the TE run flag routes to both sidelines, clearing out space underneath for the vertical seam threat, while a shallow drag crosses the underneath zone from the backfield side. The primary read progression starts with the HB seam attacking the middle of the field between the hashes, then works out to the flag route on the boundary if a linebacker or safety sinks to take away the seam.
Key the middle linebacker and single high safety immediately after the snap, since the seam route lives in the window they create if they bite on the run fake. Against Cover 3 or Cover 1, the seam route is your money read because the deep middle defender has to respect the flag routes stretching the sideline. Against Cover 2 or Cover 4 with two deep safeties sitting over the top, expect the seam to get squeezed, so be ready to check down to the drag route underneath. Watch for a user-controlled linebacker spying the seam or sitting in a lurk position, since a disciplined user defender can jump the route if the play fake does not sell. Blitz-heavy fronts that crash hard on the run fake are the best matchup for this play, since the play action creates a clean throwing window before pressure arrives.
Use this on early downs or second and medium when defenses are still respecting the run fake, since the play action sells better against aggressive run fits.
Check the pre-snap safety alignment before the snap. If you see a single high safety cheating toward the seam window, be ready to bail out to the flag route on either side instead of forcing the seam throw.
Motion into the backfield can help identify man versus zone coverage before the snap, so pair this with your pre-snap motion checks to confirm blitz or coverage rotation.
Hot route the flag routes into corner or comeback breaks against teams that sit hard on the sideline in zone shells, giving you a quick answer if the seam window closes.
Sequence this play with Mtn H Angle N Out or Mtn H Angle N Up earlier in a drive so defenders start biting on the angle routes, opening up the vertical seam shot later in the series.
















