A trap play intentionally leaves a defender unblocked, then blocks him from the side with a pulling lineman. Learn the timing, assignments and reads.

A pick route uses one receiver’s path to create traffic for another. Learn when the rub is legal, when it becomes OPI and how to spot the difference.

Inside zone uses coordinated line steps and combination blocks while the running back reads bang, bend or bounce. Learn the assignments, reads and differences from Duo, split zone and counter.

A toss sweep sends the running back toward the edge behind lead blockers. Learn the pitch, blocking rules, runner reads, variations and common mistakes.

A two-point conversion is one play from the 2-yard line after a touchdown. Learn NFL Try rules, scoring, defensive returns and strategy.

Pattern-match coverage starts with zone spacing, then assigns defenders by route. Learn carry and exchange rules, common shells and how to recognize it live.

Duo uses vertical double teams and a running back who reads the Mike linebacker. Learn every blocking job, the key cut and how duo differs from inside zone.

Split zone sends the offensive line one way and an H-back across the formation to block the backside edge. Learn every job and how to recognize it live.

A counter run uses misdirection, down blocks and pullers to create a new rushing lane. Learn GT counter, blocking jobs and how to recognize it live.

A 10-second runoff corrects late-half clock time after certain fouls or replay reversals. Learn when it applies, timeout options and why it can end a game.

A hard count changes a quarterback’s cadence to test defensive discipline. Learn how it works, when a flag is called and why every jump is not offside.

Boundary corners defend the short side; field corners defend the wide side. Learn how college hash marks change space, coverage, run support and matchups.

Sam, Mike and Will are the strong-side, middle and weak-side linebacker roles. Learn each job, how offenses identify the Mike and why nickel changes the picture.

EDGE describes a defender's job and alignment, while defensive end and outside linebacker are position families. See where the labels overlap and differ.

The Star is a scheme-specific hybrid defender, not one universal position. Learn how the role changes between nickel, safety and linebacker jobs.

An NFL catch requires control, an inbounds touch and a football move. Learn how officials separate catches, incompletions and fumbles.

A football safety is worth two points. Learn what causes one, how impetus separates a safety from a touchback, and what happens after the score.

A zone blitz sends pressure while playing zone coverage. Learn how the classic five-man fire zone works, why linemen drop, and how offenses beat it.

Cover 3 divides the deep field into three zones. Learn each defender's job, strengths, weaknesses, offensive answers and how to recognize it live.