Playbooks

In Go is a Trio Wk shotgun concept built off a deep in and go combo to the closed side, paired with a shallow drag and a check release swing out of the backfield. The outside receiver runs a deep go to clear the corner and hold the safety, while the inside receiver breaks off a deep in behind that vertical stretch, creating a natural high low on the closed side of the field. On the backside, the single receiver runs a shallow drag across the field while the running back releases into a swing route, giving the quarterback a quick outlet if the deep combo is covered. This is a man beater at its core, using the go route to occupy vertical man coverage and open a soft spot for the deep in, but it also holds up against zone if the quarterback works the shallow drag and swing as checkdowns underneath.
Watch the safety depth pre-snap, a single high safety will struggle to cover both the go and the deep in, making this a strong beater against Cover 1 and Cover 3. Key the corner over the go route at the snap, if he turns and runs with the vertical route the deep in should sit open behind him in the void. Against Cover 2 or Cover 4 shells, the deep in can get squeezed by a deep half safety, so respect the corner's ability to sink under the go and jump the in route as a user controlled defender. Look for linebackers spying the drag route across the middle, if they widen out to take away the drag the swing route from the backfield becomes the quickest answer against blitz looks. Beware disguised zone blitzes where the underneath defenders drop into the shallow drag lane, since this can bait the quarterback into a check down that gets picked off in a lurk zone.
Use this play on second or third and long when you need to stretch the field vertically and still have a checkdown available underneath.
Pre-snap, identify whether the corner over the go route is playing press man or bailing into a deep zone, since that tells you whether the go route is live or just a decoy.
If you see single high safety look, trust the deep in behind the go route since the safety has to respect the vertical shot and cannot cheat down in time.
Hot route the drag into a deeper crossing route against teams that sit their linebackers in short zones, this gives you a true man beater against Tampa 2 shells.
Sequence this play with Deep Out or Deep In from the same set to keep defenders guessing on whether the closed side combo is going over the top or settling in behind linebackers.
Pair this with HB Slip Screen or Quick Unders earlier in a series so defenders bite on quick game and open up the deep in go combo later in the drive.