Playbooks

Sluggo Seam out of Shotgun Trey Open sends the backside X on a sluggo (slant and go) up the boundary, while the three receivers to the trips side run a seam, a corner route breaking outside, and a shallow drag that crosses under the formation. The lone running back stays in to help protect, giving the quarterback a clean pocket to read from the seam route out to the sluggo. This is a man beater concept: the sluggo is designed to freeze a press or trail corner before breaking vertically, while the seam route splits the hole between inside linebackers and the safety in man or single high looks. Progression starts with the seam route as the primary read, works to the sluggo on the backside if the safety jumps the seam, and checks down to the shallow drag as the outlet against pressure.
Check the safety depth before the snap, a single high safety cheating toward the trips side leaves the backside sluggo isolated on an island. Watch the corner's press alignment on the sluggo, if he is playing outside leverage in man coverage the slant fake should open the vertical window. Read the inside linebackers, if they sink deep into the seam passing lane in a zone shell it clogs the primary read and forces the check to the drag. Identify two high safety shells like Cover 2 or Cover 4, these shrink the seam throwing lane and make the sluggo route a low percentage shot. Watch for a user controlled defender lurking underneath the seam, he can jump the throw if the quarterback stares down the read too long.
Look for single high safety shells pre-snap since the seam route is your best friend against Cover 1 and Cover 3 where the middle of the field is thin.
If the corner on the sluggo side is playing press man, trust the double move and put air under the throw once he bites on the slant fake.
Use the shallow drag as your answer against zone blitzes or when the pocket collapses quickly, it clears underneath and gives a safe completion.
Pair this play with Curls or Y Stick HB Angle in the same set to keep defenses honest on quick game before dialing up the sluggo seam shot.
Best called on second or third and medium to long when defenses start sitting on shorter routes, since the vertical shots punish that aggression.