Playbooks
Corner Blitz 3 is a Cover 3 zone blitz out of the Over G, 4-2-5 Big Nickel that sends both corners on the outside as blitzers while dropping underneath defenders into a three deep, four under shell behind them. The blocking scheme relies on the front four plus the two blitzing corners to overload the edges and collapse the pocket quickly, making this a pressure package rather than a coverage sit and read call. Your primary read as the defender is to key the quarterback's eyes immediately off the snap since the corner blitz creates a numbers advantage on the perimeter, but the underneath zone defenders must matriculate to their landmarks in the flats and hook areas to prevent quick game bailouts.
Read the running back and tight end releases first since check release protection schemes are the fastest way offenses neutralize a corner blitz. Watch for quick game concepts like slants and hitches that attack the space vacated by the blitzing corners, this is the primary counter that beats this call. Identify empty backfield or spread formations pre-snap, those alignments create natural throw lanes into the flat zones your corners just abandoned. Time your user rush to the snap count so the corner blitz arrives simultaneously with interior pressure, arriving late lets the quarterback escape or get the ball out before contact. Key on offensive tackles and tight ends sliding outside to chip or pick up the blitzing corner, that protection adjustment tells you the offense has diagnosed the pressure and you should mix in Cover 4 Palms or Cover 2 next series.
Call this on early downs or second and medium when offenses expect base coverage rather than a five man pressure look disguised as Cover 3.
Disguise the corner alignment pre-snap by showing normal press or off man leverage so the quarterback cannot identify the blitz before the ball is snapped.
Use your user controlled defender on one of the underneath zone drops to jump quick hitters and hot route sight adjustments that offenses use to counter perimeter pressure.
Pair this with Cover 3 Sky or Cover 3 Match earlier in a series so the offense sees a steady diet of three deep shells and cannot key the corner blitz tell from splits or depth.
Avoid calling this against empty or spread sets with quick bubble screens since the vacated corner areas get exposed before the rush arrives.