A route stem is the receiver's path before the main break. Learn how vertical, inside and outside stems manipulate leverage and create separation.

A quarterback sneak sends the QB directly behind the center in short yardage. Learn the blocking, risks, defensive answers and Tush Push difference.

A jumbo package adds a sixth or seventh offensive lineman for power, short yardage and play-action. Learn eligibility rules, uses and defensive counters.

A post route pushes vertically before breaking diagonally toward the goalpost. Learn its landmarks, coverage reads, combinations and quarterback timing.

A safety blitz sends a defensive back from depth, the box or the slot. Learn how coverage rotates, why the pressure works and how offenses answer it.

A crackback is an inward block from the perimeter. Learn when it becomes an illegal 15-yard NFL penalty and how it differs from blindside and chop blocks.

A force defender controls the outside edge of the run. Learn how force, spill and alley responsibilities fit together—and what to watch on the next play.

Cover 6 combines quarters on one side with Cover 2 on the other. Learn every defender’s job, why NFL teams use it, its weaknesses and how to recognize it.

Cover 0 matches every eligible receiver man to man with no deep safety. Learn how the pressure works, why defenses call it and how offenses attack it.

The red zone is the final 20 yards before the goal line. Learn why the field shrinks, which concepts work and how red zone differs from goal-to-go.

A silent count replaces the quarterback’s voice with visual cues and shared timing. Learn how the guard and center relay the road snap—and why rushers can exploit it.

A flea flicker uses a handoff, a backward toss to the quarterback and one deep pass. Learn why the run fake works, what makes it legal and where it fails.

A Green Dog blitz tells a defender to cover a releasing back but rush when the back stays to block. Learn how the conditional pressure stresses protection.

A 3-technique lines up on a guard’s outside shoulder and usually attacks the B-gap. Learn how the alignment affects run fits and interior pass rush.

A wheel route sells the flat before turning vertically up the sideline. Learn how it creates mismatches and stretches man and zone coverage.

The Texas route sells an outside release before cutting sharply inside. Learn how the angle route creates leverage against linebackers.

Blitz pickup assigns a back or tight end to an extra rusher. Learn the reads, communication and technique that protect the quarterback.

An audible lets the offense change its play before the snap after reading the defense. Learn what can change, how the call travels and why communication matters.

The Stick concept uses a short settling route and a flat route to stretch one underneath defender. Learn the receiver assignments, quarterback read and coverage answers.