Playbooks

Corner Strike is a two-man route concept out of Spread Y-Flex that isolates both boundaries with corner routes stacked over crossing shallow routes. The backside runs a corner route off a deep pattern that breaks toward the sideline while a shallow drag crosses underneath, and the frontside mirrors this with a corner route paired with a short out breaking route near the numbers. This is a man beater designed to attack off-man leverage on the outside, with the primary read progression starting at the frontside corner route since it has a shorter developing angle, then working backside to the deep corner route if the safety rotates away from the initial side.
Pre-snap, check for two deep safeties versus one high: two high shells force the corner routes into tighter windows and give help over the top on both boundaries. Post-snap, watch the flat defenders and outside linebackers for quick sink into the shallow crossers, since a disciplined zone defense will squat on those routes and bait the quarterback into a pick. Identify user-controlled safeties creeping toward the numbers pre-snap, as this indicates the defense is jumping the corner route and the quarterback should look to the opposite shallow crosser instead. Cover 3 with a hard-charging cornerback blitz off the edge can disrupt this play before the corner routes develop, so recognize press-man alignment combined with an overloaded box as a blitz key. Man coverage with no safety help over the top is the shell that gets exploited hardest here, so if the corner sees the safeties rotated to the middle of the field post-snap, trust the corner route to win outside.
Look for single high safety shells pre-snap since the corner routes on both sides attack the numbers where a lone deep defender cannot help both.
Check cornerback alignment at the snap: if you see off-man coverage with outside leverage, the corner routes have a clean angle to work over the top.
Hot route the underneath crossers into deeper digs if you diagnose zone coverage, since this concept loses value against sink and flat defenders sitting on the shallow routes.
Pair this play with Y Corner or Smash Corners on early downs to condition the defense into expecting quick outs, then hit Corner Strike when the corner rolls up expecting a shorter throw.
Best used on second and long or third and medium when you need a explosive gain and the defense is more likely to play off coverage to avoid giving up the deep shot.