Stick

The concept

An inside receiver to five yards who sits down against zone and keeps running against man, with a flat route under him.

The offense1 / 3
The look
An inside receiver running to five yards and turning, with a flat route underneath him and a vertical route clearing over the top of both.
vs Man2 / 3
The conflict
The stick never stops, so the defender never gets to pass him off. It is a chase, and the flat underneath is a second problem.
vs Man3 / 3
The throw
Read the coverage off the stick route itself — if he sat, it is zone and he is open; if he ran, it is man and you have the flat.

Why it works

One call that answers man and zone
The stick sits down against zone and keeps running against man. The receiver makes that decision; the quarterback simply throws the shape in front of him.
The flat route is not a decoy
It occupies the one defender who could otherwise close on the stick. If he takes the flat, the stick is standing in open grass.
It is a third-and-short call, and it converts
Five yards, on time, with a second answer underneath it. That is the down and distance this concept exists for.

Sitting down against man coverage
Stopping with a defender on your hip is how the ball gets intercepted. The rule is simple: covered, keep running.
The flat route crossing above the stick
It goes underneath. Above turns two routes into one covered area and gives the defender the easy answer.
Waiting for the stick to come open
He is open at five yards or not at all. Late on this throw is a linebacker with his hands up in the lane.

Open it in the designer, change the routes, save it to your playbook.