Playbooks
Flood is a classic three-level sideline flood concept out of Shotgun 11 personnel, sending a deep route, an intermediate out or corner, and a shallow flat route to the same side of the field to stack one defensive third. It is a zone beater at its core, designed to overload a cornerback and safety with three receivers stacked vertically and horizontally so one defender is always outnumbered. The primary read progression works high to low: start with the deep shot to see if the safety bites, then work down to the intermediate breaking route, and check down to the flat if the underneath defender sinks or the corner blitz shows.
Identify the deep safety alignment pre-snap, a single high safety rotated toward the flood side signals Cover 3 and tells you the flat route will be open underneath. Watch the flat defender's initial drop, if he sinks too deep trying to help on the corner route, the shallow flat throw is there immediately. Key the cornerback's leverage at the snap, outside leverage with no help over the top invites the deep sideline throw, inside leverage means the flat or intermediate out is the better answer. Look for the corner blitz off the flood side edge, if the slot or flat defender walks up pre-snap this often signals a fire zone blitz, so get the ball out on the quick flat route before pressure arrives. Cover 4 or Cover 6 shells with two defenders on the flood side can shut this concept down, since both underneath and deep routes get taken away, in that case check down to the backside hot route instead.
Use Flood against Cover 3 and Cover 2 shells where the flooded side only has two or three defenders trying to cover three routes stacked vertically.
Check the corner and safety alignment before the snap, if the corner is playing off with a deep safety rotated to that side, expect the sideline throws to be contested and lean on the flat route instead.
Hot route the backside receiver into a quick drag or option route to give yourself an answer if the defense rolls coverage away from the flood side after the snap.
This play pairs well with Mtn Mesh Flood or Dash Flood in your play-calling sequence since both attack similar flood concepts, keeping the defense guessing on which level you are attacking.
Use Flood on second or third and medium situations where defenses often sit in zone shells, since the sideline stack punishes zone drops that cannot cover all three levels.
Look to attack the boundary side flood versus Cover 3 Sky or Cover 3 Cloud shells where the cornerback has to choose between the deep and intermediate routes.