Under Front Meaning in American Football

An under front describes a defensive alignment shifting linemen toward one side. The defensive line moves slightly away from the tight end. This alignment strengthens interior run defense. Linebackers adjust their positions behind the shifted linemen. Defenses use this setup against balanced offensive formations. The front creates clear run gaps for defenders. Coordinated movement improves gap control responsibilities. Defensive coaches teach assignments carefully in this structure. Communication ensures proper alignment before the snap. Consider an offense preparing a rushing play inside. The defense sets an under front before the snap. The defensive tackle lines up slightly inside the guard. Linebackers fill running lanes immediately after the snap. The runner finds little space between defenders. The alignment helps control interior rushing lanes effectively.