Running back (American football)

Roles and types

There are several traditional and modern RB roles. Historically teams used a halfback or tailback as the primary ball carrier and a larger fullback as a lead blocker and short‑yardage runner. Contemporary distinctions include:

• Power back: focuses on inside runs and short‑yardage situations.
• Speed/scat back: relies on quickness and elusiveness to get to the edge.
• Three‑down back: capable of running, catching, and pass blocking on all downs.
• Receiving back: used often as a target out of the backfield or in screen plays.

Key responsibilities

Typical duties of a running back include rushing with the ball, catching passes from the quarterback, executing pass protection assignments to block blitzers, and blocking on running plays to help teammates. Special plays such as draws, screens, zone reads and RPOs (run‑pass options) often involve the RB in creative ways.

Physically, successful running backs combine balance, acceleration, lateral agility and toughness; they must also read blocks and react quickly. The position carries injury risk from frequent contact, so conditioning and technique matter for longevity.

History and modern trends

Early formations emphasized the ground game and distinct running roles. Over time, schemes evolved to favor passing, hybrid backs and committees of multiple backs with specialized skills. Today many offenses value backs who can catch and protect as much as they can run, though teams still deploy single‑purpose backs in goal‑line and short‑yardage situations.