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Breakdown
PA Flood out of Singleback Ace 12 personnel sells the play-action fake to the HB before flooding one side of the field with three receivers stacked at different depths, typically a deep route, an intermediate out or corner, and a shallow flat route. This three-level flood concept is built to overload a single zone defender or corner in Cover 3, forcing a horizontal and vertical stretch he cannot cover alone. The primary read progression works high to low: check the deep shot first, come down to the intermediate breaking route if the deep man is capped, and dump to the flat as the outlet against pressure or if the flood side is squeezed.
Defensive Reads
Identify single high safety pre-snap since that usually means Cover 3, which is the shell this flood concept is built to exploit by overloading the deep third defender. Watch the flat defender and corner on the flood side post-snap, if the corner sinks with the deep route and the flat defender jumps the shallow route, the intermediate breaking route is the window to attack. Key linebacker depth at the snap, shallow linebackers who bite hard on the run fake create running lanes underneath for the intermediate route and open throwing lanes for user-controlled quarterbacks. Beware of Cover 4 or two-high shells that roll a safety over to the flood side, since this cuts off the deep shot and forces you to rely on the flat and intermediate routes only. Recognize disguised blitzes where a linebacker shows blitz then bails into a flood zone drop, a common user trick to bait the deep throw, so double check the flat defender's depth before pulling the trigger on the vertical route.
Usage Tips
Look at the pre-snap safety alignment before the snap, a single high safety often signals Cover 3 or Cover 1, which is exactly what this flood concept is designed to punish.
Use the play-action fake fully by letting the animation play out, since a slow linebacker bite or DL crash opens throwing lanes and buys time for the deep route to develop.
Hot route the backside receiver into a quick drag or spot route to give yourself a check-down answer against man coverage if the defense shows two-high pre-snap and rotates late.
Call this on early downs, second and medium or third and long, to keep defenses honest since the run fake has more credibility when defenders respect early-down run tendencies.
Pair PA Flood with HB Stretch or Inside Zone earlier in a series so the linebackers key run fits, then punish that aggressiveness with the flood concept once you have their eyes drawn downhill.
