NFL Preview: RB glossary

Alley Hole to run through, usually with blocks not only at line of scrimmage but also at the linebacker level.

Belly Running play in which two backs attack different holes, often with fake handoff before or after real one.

Blast Inside running play in which ballcarrier follows fullback, who blocks middle linebacker one-on-one. Often called an isolation play, or simply an iso.

Body Lean Standard ballcarrier position, pitched slightly forward, shoulder pads centered above knees. Proper body lean keeps pad level low and momentum moving forward.