Fullback (gridiron football)

In the days before two platoons, the fullback was usually the team's punter and drop kicker.[2] When at the beginning of the 20th century, a penalty was introduced for hitting the opposing kicker after a kick, the foul was at first called "running into the fullback", inasmuch as the deepest back usually did the kicking.[3]

Before the emergence of the T-formation in the 1940s, most teams used four offensive backs, lined up behind the offensive line, on every play: a quarterback, two halfbacks, and a fullback. The quarterback began each play a quarter of the way "back" behind the offensive line, the halfbacks began each play side by side and halfway "back" behind the offensive line, and the fullback began each play the farthest "back" behind the offensive line. Each offensive back was known by a position name that described his relative distance behind the offensive line.

As the quarterback was typically the offensive back who first touched the ball after the snap, quarterbacks were the offensive back most likely to pass the ball, although any eligible player may do so. As the game evolved and alternate formations came in and out of fashion, halfbacks (reduced to typically just one rather than two) emerged as the offensive back most likely to run the ball, although, again, any eligible player may do so. "Halfback" came to be synonymous with "running back". Fullbacks were primarily used as blocking backs with only occasional ball carrying duties. As formations began to favor placing the blocking back ahead of/ closer to the line of scrimmage than the running back, these blocking backs retained the name "fullback" even though they were closer to the offensive line than the halfback. "Fullback" became a misnomer, and the term "halfback" declined in usage, replaced variously with the more descriptive term "tailback" or the generic term "running back".

In the modern game, when the quarterback is under center, the fullback most often lines up directly behind the quarterback and in front of the halfback or tailback. The fullback position has seen a decline in recent time, with only 17 full-time fullbacks playing in 2016. The trend can be traced back to teams choosing to pass more, the use of "11 personnel" (one running back and one tight end), and the use of hybrid "H-backs".[4]

Fullback John Kuhn, with shirt #30, carrying the ball.

Fullbacks are typically known less for speed and agility and more for muscularity and the ability to shed tackles. In 2010s NFL, fullbacks, while occasionally deployed as ball carriers, are often primarily a lead blocker to allow running backs to get to the secondary of the opposing team's defense. In the early 2000s, many NFL teams used blocking fullbacks, such as Tony Richardson and Lorenzo Neal, with great success. These backs cleared the way for some of the decade's great running backs. Later on, some teams have phased the fullback position out of their offense altogether, with those teams either all but eschewing the I-formation, or instead utilizing either a tight end, h-back, or backup running-back in the role.

Today, there are several fullbacks still prominent in the NFL, among them C. J. Ham, Andy Janovich, Jamize Olawale, James Develin, Patrick Ricard (American football), Alec Ingold, Patrick DiMarco, Anthony Sherman, Kyle Juszczyk, and Keith Smith. In spite of their usually infrequent carries, some fullbacks have led their team in rushing – among the most notable ones were Le'Ron McClain who was the rushing leader for the Baltimore Ravens in 2008 and Tony Richardson who led the Kansas City Chiefs in rushing in 2000. Former Browns running back Peyton Hillis started his NFL career as a fullback before being converted into a halfback.

Blocking

Running behind the fullback: The QB is about to hand the ball over to the half back #45 who will run with it behind the full back #49

Although technically a running back, typically fullbacks are primarily valued for their blocking in most 21st century offenses. The most common and simple runs, the dive, and the blast, both employ the fullback as the primary blocker to "make way" for the halfback. In the flexbone formation, however, the fullback (sometimes referred to as the B-back) can often be used as the primary rushing threat.

In many other offensive schemes, the fullback is used as a receiver, especially when the defense blitzes. In selected plays, some teams will have a defensive lineman report as an eligible receiver to line up as a fullback ("Jumbo" or "Heavy Jumbo") or as a tight end in a "Miami" package in goal-line formations. Players who have been frequently used as situational fullbacks include Haloti Ngata, Dontari Poe, Jared Allen while with the Kansas City Chiefs, Richard Seymour while with the New England Patriots, and Isaac Sopoaga while with the San Francisco 49ers, while Dan Klecko and Nikita Whitlock have played both as a defensive tackle and fullback. Defensive Tackle William "The Refrigerator" Perry scored a touchdown in Super Bowl XX from the fullback position.