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Quick Reference
Breakdown
Cover 2 Sink is a zone coverage call out of the Dime 2-3-6 set built to clamp down on dink and dunk passing while sinking underneath routes into the two deep safeties. The two corners and three underneath defenders sink into intermediate zones, discouraging in-cuts and hook routes, while the two deep safeties split the field to erase go routes and deep posts. This is a zone beater killer rather than an offensive play, so as the defender you are reading the quarterback drop and letting your zone landmarks trigger off route distribution, with the primary read progression flowing from the deep half safeties down to the flat and hook defenders underneath.
Defensive Reads
Pre snap, identify if the offense is running two receivers vertically into each deep safety zone, since Cover 2 Sink is naturally weak to four verticals that force the safeties to choose between threats Watch for the deep in or dig route sitting behind the sink defenders but in front of the safeties, as this is the classic Cover 2 beater window that a mobile quarterback with time will exploit Key the running back and tight end releases out of the backfield, since seam routes and wheel routes attacking the deep half safety leverage are the primary man to zone conflict this shell creates Post snap, watch your underneath defenders sink hard and do not let them get baited by shallow crossers, since staying disciplined in the sink technique is what shuts down quick game route combos Look for empty backfield or spread bunch formations pre snap, which stress the flat defenders and can create natural rubs against your sink zones if your linebackers do not adjust depth quickly
Usage Tips
Call Cover 2 Sink on early downs or second and medium when you expect the offense to attack underneath with drag and flat combos, since the sink technique clogs those throwing lanes before the quarterback can reset his eyes downfield
Pre snap, check the offensive formation for stacked or bunch sets that can create natural picks against your underneath defenders, and audible your linebackers or slot corners to shift the sink zones if you see heavy trips to one side
Use the flat defenders to squeeze pick routes and shallow crossers, then user the deep safety on the receiver breaking to the corner or post since that is the primary vulnerability in any two deep shell
Pair this call with Cover 2 Hard Flat or Tampa 2 in the same set to disguise your shell, showing the same two safety look pre snap while changing the underneath drop depths to keep quarterbacks guessing
Avoid this call on third and long against spread four verticals concepts unless you have confidence in your deep safeties, since the sink technique sacrifices some depth on the underneath zones to take away the quick game
