1-gap

One-gapping is the aggressive, penetrating style of defensive-line play: the lineman is responsible for a single assigned gap and attacks it upfield off the snap, trying to disrupt in the backfield rather than read and react. It trades the discipline of two-gapping for quickness and havoc, and it asks for get-off and explosion more than sheer mass. The opposite is two-gapping, where a lineman controls the blocker and reads the play before shedding.

Defined by Coach Jay Freeman — 32 years coaching the offensive and defensive line.

Related trench terms

2-gapD-Line

A defensive technique where the lineman is responsible for both gaps on either side of the blocker he lines up over.

Get-offD-Line

The first step from the stance. The single biggest defensive-line weapon.

SlantD-Line

A pre-snap-called movement where the D-lineman attacks a gap to one side at the snap.

Bull rushD-Line

A power-based pass rush move — straight-line force driven into the blocker to walk him back into the QB.

Speed rushD-Line

An edge-based pass rush — outside leverage and acceleration to run the arc around the tackle.

Go deeper

• Coach Jay’s lineman training library — the technique behind the term →
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