Playbooks

Not in any team playbook.
Duo out of Shotgun Bunch Open Offset lines up with a bunch of three receivers to one side, an isolated WR to the other, and the HB set behind the QB for a downhill run play. The offensive line uses double team blocks at the point of attack designed to displace the interior defensive line before combo blockers climb to the second level and seal linebackers, giving the HB a two step read to press the hole and cut off the double teams. This is a pure gap and power run scheme (not a play-action or RPO look), and the primary read progression for the ball carrier is patience: press the line, read the double team leverage, then cut off whichever linebacker gets blocked or overpursues.
Key the middle linebacker depth before the snap. If he is sitting shallow and square, he is reading run fit and will be tough to displace with the double team. Watch for a 6 or 7 man box. Duo struggles against gap exchange fronts and heavy blitz packages that get an extra defender unblocked at the point of attack. Post-snap, track whether the double team blockers successfully climb to the second level. If a user-controlled linebacker sits in the gap and refuses to take the double team bait, the cutback lane disappears. This play is vulnerable to defensive line slants and odd front stacks that create immediate two-gap conflicts for the interior blockers, so if you see a 3-4 under front with the nose shaded, expect penetration. Man coverage on the bunch side can leave extra defenders in the box since the WRs are not stressing the defense vertically, so if the corners are pressed tight, expect a loaded front and consider checking to a different run concept.
Run Duo on early downs, especially 1st and 10 or 2nd and short, when you want to establish tempo and force the defense to commit extra bodies to the box.
Check the pre-snap box count and safety depth. If the defense is in a light box with only 6 defenders or a single high safety, this scheme wins easily against the double teams.
Use your HB's press and cut timing manually. Do not rush the hole, let the double team blockers work up to the second level before you commit to a lane.
Pair this with Inside Zone and HB Draw from the same set so the defense cannot key run fits based on formation alone, then hit them with RPO Read Bubble or RPO Peek WR Screen when they start crashing linebackers downhill.
Against stacked boxes or heavy blitz looks, motion is limited from this bunch alignment, so lean on tempo and repetition instead to condition linebacker overpursuit before calling a cutback shot.