fullback

Fullback is a position in several team sports, occupying a deep defensive backfield. Across codes, the fullback often defends against attacks, supports teammates, and helps move the ball. Responsibilities vary by game system, but the role generally requires pace, awareness, and reliable decision making.

In American football, the fullback (FB) is a backfield position behind the quarterback. Traditionally a lead blocker on running plays, the fullback also handles short-yardage rushing, pass protection, and occasional receptions. In recent decades, NFL usage has declined, with teams often using a lighter tailback or tight end instead.

In rugby union, the fullback wears the number 15 shirt and lines up behind the back three. The duties include fielding opposition kicks, making accurate tactical kicks, and acting as a counter-attacking option. The position requires strong positional sense, catching under pressure, and speed to return to defense.

In rugby league, the fullback, designated as number 1, serves as the last line of defense and a key counter-attacker. They field kicks, return the ball, and link with the backs to start attacking plays. Speed, catching, and the ability to read sets are important.

In Australian rules football, a fullback is a defender in the backline tasked with negating tall forwards, spoiling marks, and repelling forward thrusts. A modern fullback may also contribute to ball movement from the backline and to kick-ins after scores.

Across codes, successful fullbacks share attributes such as game awareness, reliable catching, blocking or tackling, and the ability to read plays and initiate counterattacks. The role combines defense and ball skills, with responsibilities that shift according to tactics and level of play.