Description

Roger Holmes, Head Coach, Dublin HS, GA

Full video on Glazier Drive:  Simple Secondary Adjustments in the 4-3 Using Cover 2 & 3: Align Quickly vs Tempo Offenses, Handling Motions & Simple Adjustments in the Secondary to Unbalanced Formations

OVERVIEW

This video covers defensive back keys, alignments, and coverage adjustments for football coaches, with a focus on cover three and cover two concepts against various offensive formations.

QUARTERBACK LANE READS FOR DEFENSIVE BACKS

DBs aligned on wide receivers use a three-lane system to read run or pass. Lane one (shoulders down the line) means run support. Lane two (45-degree angle off the line) means pass. Lane three (straight dropback) means pass, and the DB focuses entirely on coverage before considering run responsibilities.

TIGHT END KEYS FOR STRONG SAFETY

When a DB is aligned off a tight end, the tight end becomes the primary run/pass key — not the quarterback. An important coaching point is raised: the cue "tight end blocks, set the edge" caused problems when a tight end was blocking out on the nine technique. The corrected language became — if he reaches, set the edge; if he turns him out, hang and find the ball inside.

GUN TEAMS AND SPREAD ADJUSTMENTS

Against gun teams, DBs key the end man on the line of scrimmage. The free safety in cover three keys an offensive lineman — often the strong side guard — to anticipate pulls and get downhill in the run game.

COVER THREE ALIGNMENTS

Strong corner: 1x7. Strong safety: 3x5 off #2. Weak corner: 1x7. Free safety: 10–14 yards deep, never wider than the offensive tackle. Depth adjusts based on hash position and sky vs. cloud calls.

FORMATION ADJUSTMENTS AND AUTOMATIC CHECKS

Multiple receivers to the field triggers cover three. Multiple receivers into the boundary triggers a cover two check. Motion can flip these checks dynamically. A key principle throughout is keeping the rover (strong safety) as the edge setter — never a deep player — which allows the defense to reduce the width of the field and stay sound against the run regardless of coverage.

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