What Does a Fullback Do in Football? Role Explained

By Sarah Miller · December 14, 2030

In American football, a fullback (FB) is primarily a blocking back who protects the halfback, executes lead blocks, and occasionally carries the ball or catches passes in short-yardage situations. Known for strength and physicality, the fullback plays a crucial role in both run and pass protection schemes.

What Is a Fullback in Football?

The fullback is a position in American football typically found in traditional offensive formations like the I-formation or wishbone. Though less common in modern spread offenses, the fullback remains vital in specific game situations due to their power and versatility.

Core Responsibilities of a Fullback

Lead blocking for the primary running back
Short-yardage rushing attempts (e.g., goal-line or third-and-short)
Pass protection for the quarterback on play-action or rollout plays
Occasional receiving out of the backfield
Special teams contributions

Evolution of the Fullback Role Over Time

Historically, the fullback was the primary ball carrier in early football systems like the single-wing. However, as offenses evolved toward more passing and speed-oriented schemes, the role shifted from featured runner to a strategic, power-based support player.

From Ball Carrier to Blocker

In the mid-20th century, fullbacks like Jim Brown dominated as rushers. Today, only a handful of NFL teams regularly feature a fullback, with most offenses using tight ends or H-backs to fulfill similar roles. The shift reflects broader trends toward pace, space, and three-receiver sets.

Key Skills and Attributes of a Successful Fullback

Fullbacks are evaluated based on physical and mental traits essential for their high-impact, low-visibility role.

Physical and Mental Requirements

Size and Strength: Typically 6'0"–6'2", 240–250 lbs, built to absorb and deliver contact
Blocking Technique: Mastery of angle, timing, and leverage in run and pass protection
Football IQ: Understanding defensive alignments and blitz pickups
Reliability: Trusted in critical downs without drawing significant attention

Fullback vs. Halfback: Understanding the Differences

While both are running backs, the fullback and halfback (or tailback) serve distinct roles.

Attribute	Fullback (FB)	Halfback (HB)
Average Weight (NFL, 2024)	245 lbs	215 lbs
Average Rushing Yards per Season (2023)	89 yards	742 yards
Carries per Game (2023 avg.)	2.1	16.3
Receptions per Game (2023 avg.)	1.4	3.2
Primary Role	Blocker / Short-Yardage Runner	Feature Ball Carrier

Table data source:1, 2

The data shows that modern fullbacks have minimal offensive touches compared to halfbacks, emphasizing their role as blockers rather than primary weapons. Despite fewer stats, their contribution to offensive line success and short-yardage efficiency remains measurable in win probability models.

Notable Fullbacks in NFL History

Certain players have defined the position through excellence and adaptability.

Jim Brown (Cleveland Browns): A rare fullback who was also a dominant rusher in the 1950s–60s
Mike Alstott (Tampa Bay Buccaneers): Six-time Pro Bowler known for power running and receiving
Leonard Weaver (Philadelphia Eagles): One of the last elite dual-threat fullbacks before the position declined
John Kuhn (Green Bay Packers): Key contributor in Super Bowl XLV, excelling in goal-line packages

Frequently Asked Questions About Fullbacks in Football

What does a fullback do in football?

A fullback primarily serves as a blocker for the halfback, leads on running plays, and may carry the ball in short-yardage or goal-line situations. They also contribute in pass protection and special teams.

Is a fullback the same as a running back?

All fullbacks are running backs, but not all running backs are fullbacks. The term "running back" includes halfbacks/tailbacks and fullbacks, with the latter focusing more on blocking and power runs.

Why don't teams use fullbacks as much today?

Modern NFL offenses prioritize speed, spacing, and multiple wide receiver sets, reducing the need for traditional fullbacks. Their role has been absorbed by versatile tight ends and H-backs in many systems.

Can a fullback throw the ball?

Yes, though rarely. A fullback can legally throw the ball if they are behind the line of scrimmage. Trick plays like reverses or screen passes may involve a fullback as a passer.

Who are some current NFL fullbacks?

As of 2025, notable active fullbacks include Patrick Ricard (Baltimore Ravens), Michael Burton (New Orleans Saints), and Tory Carter (Minnesota Vikings). These players are mainly used in blocking and special teams roles.