Cover 3 Sky

Pre snap, check if the offense is running trips or four verticals since three deep zone with only three deep defenders can be vulnerable to seam throws between the corner and deep safety. Watch the mugged linebackers post snap, if they blitz the offense gets a hot read beater but if they drop into zone they can rob shallow crossers and quick game routes. This shell holds up well against man beater concepts like slants and drags since the underneath zone defenders sit in throwing lanes, but it can be exploited by good route timing on deep outs into the flat defender's zone. Look for the flat defenders sinking versus curling since the Sky rotation call means the corner should widen to the flat while the safety rotates down, leaving a potential soft spot over the middle if the linebackers get too aggressive. Key the offensive formation width, if receivers are bunched or stacked the underneath defenders may have conflicting assignments, creating natural rub route windows against the zone.