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Linebacker (LB) is a playing position in gridiron football. Linebackers are members of the defensive team, and line up three to five yards behind the
line of scrimmage In gridiron football, a line of scrimmage is an imaginary transverse line (across the width of the field) beyond which a team cannot cross until the next play has begun. Its location is based on the spot where the ball is placed after the end o ...
and the defensive linemen. They are the "middle ground" of defenders, playing closer to the line of scrimmage than the
defensive backs In gridiron football, defensive backs (DBs), also called the secondary, are the players on the defensive side of the ball who play farthest back from the line of scrimmage. They are distinguished from the other two sets of defensive players, the ...
(secondary), but farther back than the defensive linemen. As such, linebackers play a hybrid role and are often the most versatile players on the defensive side of the ball; they can be asked to play roles similar to either a defensive lineman (such as stopping the runner on a running play) or a defensive back (such as dropping back into pass coverage). How a linebacker plays their position depends on the defensive alignment, the philosophy of the coaching staff, and the particular play the offense may call. Linebackers are divided into middle linebackers, sometimes called inside linebackers, and outside linebackers. The middle linebacker, often called "Mike", is frequently the "
quarterback The quarterback (commonly abbreviated "QB"), colloquially known as the "signal caller", is a position in gridiron football. Quarterbacks are members of the offensive platoon and mostly line up directly behind the offensive line. In modern Ame ...
of the defense". His central role on the field means he is in the best position to call defensive plays and direct shifts and changes based on what the offense is doing. Outside linebackers are often in a position to
blitz Blitz, German for "lightning", may refer to: Military uses *Blitzkrieg, blitz campaign, or blitz, a type of military campaign *The Blitz, the German aerial campaign against Britain in the Second World War *, an Imperial German Navy light cruiser b ...
, a defensive maneuver where the player rushes into the offensive backfield to disrupt a running play or sack the quarterback on passing plays. Besides "Mike", other nicknames such as "Sam", "Will", or "Jack", are commonly used to refer to various linebacking roles. Historically, some of the most impactful defensive players, such as
Pro Football Hall of Fame The Pro Football Hall of Fame is the hall of fame for professional American football, located in Canton, Ohio. Opened on September 7, , the Hall of Fame enshrines exceptional figures in the sport of professional football, including players, coa ...
members Lawrence Taylor, Dick Butkus,
Ray Nitschke Raymond Ernest Nitschke (December 29, 1936 – March 8, 1998) was a professional American football middle linebacker who spent his entire 15-year National Football League (NFL) career with the in the Pro Football Hall of Fame in , he was the a ...
, Chuck Bednarik, Mike Singletary, and
Ray Lewis Raymond Anthony Lewis Jr. (born May 15, 1975) is an American former professional football player who played as a middle linebacker with the Baltimore Ravens for his entire 17-year career in the National Football League (NFL). He played co ...
, were linebackers.


History

Before the advent of the two-platoon system with separate units for offense and defense, the player who was the team's
center Center or centre may refer to: Mathematics *Center (geometry), the middle of an object * Center (algebra), used in various contexts ** Center (group theory) ** Center (ring theory) * Graph center, the set of all vertices of minimum eccentrici ...
on offense was often, though not always, the team's linebacker on defense. Hence today one usually sees four defensive linemen to the offense's five or more. Most sources claim coach
Fielding H. Yost Fielding Harris Yost (; April 30, 1871 – August 20, 1946) was an American football player, coach and college athletics administrator. He served as the head football coach at: Ohio Wesleyan University, the University of Nebraska, the University ...
and center
Germany Schulz Adolph George "Germany" Schulz (April 19, 1883 – April 14, 1951) was an All-American American football center for the University of Michigan Wolverines from 1904 to 1905 and from 1907 to 1908. While playing at Michigan, Schulz is credited wit ...
of the
University of Michigan , mottoeng = "Arts, Knowledge, Truth" , former_names = Catholepistemiad, or University of Michigania (1817–1821) , budget = $10.3 billion (2021) , endowment = $17 billion (2021)As o ...
invented the position. Schulz was Yost's first linebacker in 1904 when he stood up from his usual position on the line. Yost was horrified at first, but came to see the wisdom in Schulz's innovation. William Dunn of Penn St. was another Western Conference linebacker soon after Schulz. However, there are various historical claims tied to the linebacker position, including some before 1904. For example,
Percy Given J. Percy Given was a college football player and coach. Georgetown Player He was an All-Southern center for the Georgetown Hoyas of Georgetown University, weighing 225 pounds. Georgetown authorities claimed it was Given, as opposed to German ...
of Georgetown is another center with a claim to the title "first linebacker," supposedly standing up behind the line well before Schulz in a game against
Navy A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It in ...
in 1902. Despite Given, most sources have the first linebacker in the South as
Frank Juhan Francis Alexander "June" Juhan (April 27, 1887 – December 31, 1967) was an American football player and coach as well as an Episcopal bishop. He played center for the Sewanee Tigers football team and was the first roving linebacker in the Sout ...
of
Sewanee Sewanee may refer to: * Sewanee, Tennessee * Sewanee: The University of the South * ''The Sewanee Review'', an American literary magazine established in 1892 * Sewanee Natural Bridge * Saint Andrews-Sewanee School See also * Suwanee (disambiguati ...
. In the East, Ernest Cozens of Penn was "one of the first of the roving centers," another, archaic term for the position, supposedly coined by
Hank Ketcham Henry King Ketcham (March 14, 1920 – June 1, 2001) was an American cartoonist who created the '' Dennis the Menace'' comic strip, writing and drawing it from 1951 to 1994, when he retired from drawing the daily cartoon and took up painting ...
of
Yale Yale University is a private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and among the most prestigious in the wor ...
.
Walter E. Bachman Walter Ellsworth "Scrapper" Bachman Sr. (March 19, 1879 – November 11, 1958) was an American college football player and coach. A player at Lafayette College from 1899 until 1901, Bachman developed the " roving center" position for college footb ...
of
Lafayette Lafayette or La Fayette may refer to: People * Lafayette (name), a list of people with the surname Lafayette or La Fayette or the given name Lafayette * House of La Fayette, a French noble family ** Gilbert du Motier, Marquis de Lafayette (1757 ...
was said to be "the developer of the "roving center" concept". Edgar Garbisch of
Army An army (from Old French ''armee'', itself derived from the Latin verb ''armāre'', meaning "to arm", and related to the Latin noun ''arma'', meaning "arms" or "weapons"), ground force or land force is a fighting force that fights primarily on ...
was credited with developing the "roving center method" of playing defensive football in 1921. In professional football,
Cal Hubbard Robert Calvin Hubbard (October 31, 1900 – October 17, 1977) was an American professional football player and Major League Baseball (MLB) umpire. After playing college football at Centenary College and Geneva College, Hubbard played in the N ...
is credited with pioneering the linebacker position. He starred as a tackle and
end End, END, Ending, or variation, may refer to: End *In mathematics: ** End (category theory) ** End (topology) **End (graph theory) ** End (group theory) (a subcase of the previous) **End (endomorphism) *In sports and games **End (gridiron footbal ...
, playing off the line in a style similar to that of a modern linebacker.


Types


Middle linebacker

The middle or inside linebacker (MLB or ILB), sometimes called the "Mike" or "Mac", is often referred to as the "
quarterback The quarterback (commonly abbreviated "QB"), colloquially known as the "signal caller", is a position in gridiron football. Quarterbacks are members of the offensive platoon and mostly line up directly behind the offensive line. In modern Ame ...
of the defense". Often it is the middle linebacker who receives the defensive play calls from the sideline and relays that play to the rest of the team, and in the NFL he is usually the defensive player with the electronic sideline communicator. A jack-of-all-trades, the middle linebacker can be asked to blitz (though they often blitz less than the outside linebacker), cover, spy the
quarterback The quarterback (commonly abbreviated "QB"), colloquially known as the "signal caller", is a position in gridiron football. Quarterbacks are members of the offensive platoon and mostly line up directly behind the offensive line. In modern Ame ...
, or even have a deep middle-of-the-field responsibility in the
Tampa 2 The Tampa 2 is an American football defensive scheme popularized by (and thus named after) the Tampa Bay Buccaneers National Football League (NFL) team in the mid-1990s–early 2000s. The Tampa 2 is typically employed out of a 4–3 defensive ali ...
defense. In standard defenses, middle linebackers commonly lead the team in tackles. The terms ''middle'' and ''inside'' linebacker are often used interchangeably; they are also used to distinguish between a single middle linebacker playing in a 4–3 defense, and two inside linebackers playing in a 3–4 defense. In a 3–4 defense, the larger, more run-stopping-oriented linebacker is usually still called "Mike", while the smaller, more pass protection/route coverage-oriented player is called "Will". "Mikes" usually line up towards the strong side or on the side the offense is more likely to run on (based on personnel matchups) while "Wills" may line up on the other side or even a little farther back between the defensive line and the secondary.


Outside linebacker

The outside linebacker (OLB), sometimes called the "Buck, Sam, and Rebel" is usually responsible for outside containment. This includes the strongside and weakside designations below. They are also responsible for blitzing the quarterback. Not only is the OLB responsible for outside containment and blitzing the QB, but they also have to perform pass coverage in the flats – sometimes called a drop. Outside linebackers pass coverages covers quick slants outside, in curls in the flats. The "flats" are the edge of the field closest to the sideline, from the line of scrimmage down about ten yards. John Alexander is the first person to have played outside linebacker in the NFL.


Strongside linebacker

The strongside linebacker (SLB) is often nicknamed the "Sam" for purposes of calling a
blitz Blitz, German for "lightning", may refer to: Military uses *Blitzkrieg, blitz campaign, or blitz, a type of military campaign *The Blitz, the German aerial campaign against Britain in the Second World War *, an Imperial German Navy light cruiser b ...
. Since the strong side of the
offensive team In American football, the specific role that a player takes on the field is referred to as their "position". Under the modern rules of American football, both teams are allowed 11 players on the field at one time and have "unlimited free substitu ...
is the side on which the
tight end The tight end (TE) is a position in American football, arena football, and Canadian football, on the offense. The tight end is often a hybrid position with the characteristics and roles of both an offensive lineman and a wide receiver. Like ...
lines up, or whichever side contains the most personnel, the strongside linebacker usually lines up across from the tight end. Often the strongside linebacker will be called upon to tackle the
running back A running back (RB) is a member of the offensive backfield in gridiron football. The primary roles of a running back are to receive American football plays#Offensive terminology, handoffs from the quarterback to Rush (American football)#Offen ...
on a play because the back will be following the tight end's block. He is most often the strongest linebacker; at the least he possesses the ability to withstand, shed, and fight off blocks from a tight end or fullback blocking the backside of a pass play. The linebacker should also have strong
safety Safety is the state of being "safe", the condition of being protected from harm or other danger. Safety can also refer to the control of recognized hazards in order to achieve an acceptable level of risk. Meanings There are two slightly dif ...
abilities in pass situation to cover the tight end in man on man situations. He should also have considerable quickness to read and get into coverage in zone situations. The strongside linebacker is also commonly known as the


Weakside linebacker

The weakside linebacker (WLB), or the "Will" in 4–3 defense, sometimes called the backside linebacker, or "Buck", as well as other names like Jack or Bandit, must be the fastest of the three, because he is often the one called into pass coverage. He is also usually chasing the play from the backside, so the ability to maneuver through traffic is a necessity for the Will. The Will usually aligns off the
line of scrimmage In gridiron football, a line of scrimmage is an imaginary transverse line (across the width of the field) beyond which a team cannot cross until the next play has begun. Its location is based on the spot where the ball is placed after the end o ...
at the same depth as Mike. Because of his position on the weakside, the Will does not often have to face large interior linemen one on one unless one is pulling. In coverage, the Will often covers the back that attacks his side of the field first in man coverage, while covering the weak flat in Texas Loop or hooks/curl areas in zone coverage. The weakside linebacker is also commonly known as the


Formations

The number of linebackers is dependent upon the
formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondar ...
called for in the play; formations can call for as few as none, or Most defensive schemes call for three or four, which are generally named for the number of linemen, followed by the number of linebackers (with the 46 defense being an exception). For example, the 4–3 defense has four defensive linemen and three linebackers; conversely, the 3–4 defense has three linemen and four linebackers.


4–3 defense

In the 4–3 defense there are four down linemen and three linebackers. The middle linebacker is designated "Mike" (or "Mac") and two outside linebackers are designated "Sam" and "Will" according to how they line up against the offensive formation. If there is a strong call, the linebacker on the strongside is called "Sam", while the linebacker on the weakside is called "Will". The outside linebacker's job is to cover the end to make sure a run does not escape and to watch the pass and protect from it. The middle linebacker's job is to stop runs between the
tackles Tackle may refer to: * In football: ** Tackle (football move), a play in various forms of football ** Tackle (gridiron football position), a position in American football and Canadian football ** Dump tackle, a forceful move in rugby of picking u ...
and watch the entire field to see the play develop. On pass plays, the linebackers' responsibilities vary based upon whether a man or zone coverage is called. In zone coverage, the linebackers will generally drop into across the middle of the field. However, some zones will send the outside linebackers into the flats (area directly to the left and right of the hash marks, extending 4–5 yards downfield). In a man-to-man call, the "Sam" will often cover the tight end with help from a safety over the top, while at other times, the "Sam" and "Will" will be responsible for the first man out of the backfield on their side of the center, with the "Mike" covering if a second man exits on that side of the field. In the "
Tampa 2 The Tampa 2 is an American football defensive scheme popularized by (and thus named after) the Tampa Bay Buccaneers National Football League (NFL) team in the mid-1990s–early 2000s. The Tampa 2 is typically employed out of a 4–3 defensive ali ...
" zone defense, the middle linebacker is required to drop quickly into a deep middle zone pass coverage thus requiring a quick player at this position.


3–4 defense

In the 3–4 defense three linemen play the line of scrimmage and four linebackers back them up, typically two outside linebackers and two inside linebackers. The weakside inside linebacker is typically called the "Will," while the strong side or middle inside linebacker is called the "Mike". "Sam" is a common designation for strong outside linebacker, while the other position is usually called "Jack" and is often a hybrid DE/LB. The idea behind the 3–4 defense is to disguise where the fourth rusher will come from. Instead of the standard four down-linemen in the 4–3, only three players are clearly attacking nearly every play. A key for running this defense successfully is having a defensive front of three large defensive linemen who command constant double teams. In particular, the nose tackle, who plays over the offensive center, must be able to hold ground and to occupy several offensive blockers to allow the linebackers to make plays. The focus of the 3–4 defensive line is to occupy offensive linemen thus freeing the linebackers to tackle the running back or to rush the passer or otherwise drop into pass coverage. Generally, the primary responsibilities for both outside linebackers are to stop the run and rush the quarterback in passing situations, in which they line in front of the tackles like true defensive ends. The outside linebackers in a 3–4 defense must be very skilled at rushing the quarterback, and would be playing defensive end in a 4–3 defense. Among inside linebackers, one is generally a run-stuffer who is better able to handle offensive linemen and stop running backs, while the other is often a smaller, faster player who excels in pass coverage. However, the smaller or cover LB should also be able to scrape and plug running lanes decently. The design concept of the 3–4 defense is to confuse the offensive line in their blocking assignments, particularly in pass blocking, and to create a more complex read for the quarterback. Many 3–4 defenses have the ability to quickly morph into a 4–3 on the field.


46 defense

In the 46 defense, there are four linemen, three linebackers and a safety who is moved up behind the line of scrimmage. Thus, it appears as if there are four linebackers, but it is really three linebackers with one safety playing up with the other linebackers. Three of the defensive linemen are over both of the offensive guards and the center, thereby making it difficult to double team any one of the three interior defensive linemen. This can also take away the ability of the offense to pull the guards on a running play, because this would leave one of the defenders unblocked, or, at best, give another lineman a very difficult block to make on one of the defenders. The safety, like the linebacker, can blitz, play man-on-man, play zone, or drop back into deep coverage like a normal safety would do. The 46 is used in heavy run situations to stop the run, when a team wants to apply much pressure, or merely to confuse the
quarterback The quarterback (commonly abbreviated "QB"), colloquially known as the "signal caller", is a position in gridiron football. Quarterbacks are members of the offensive platoon and mostly line up directly behind the offensive line. In modern Ame ...
and offensive line.


4–4 defense

This defense is effective at run-stopping but is weaker than a 4–3 defense at pass coverage because it uses only three defensive backs. This defensive scheme is often played with two inside line backers and two outside line backers. The names of the two inside line backers are often called Sam and Mike and these two are lined up about four yards from the line of scrimmage and are lined up with the offensive guard. The inside line backers are often more of a run player so they will defend the run before they will the pass. These line backers will be reading the offensive guard so they know what to do, so if the guard sets up to pass block the line backers know to get into their zone in order to cover the pass. If the guard come out for a run play they know that they need to fill the gap that they are supposed to so that they can make a play if it comes to them. Also, these inside line backers are often called on a blitz which is when no matter what the offense does, as soon as that ball is snapped they are shooting their gap and trying to get into the back field to make a play as fast as possible. Outside line backers sometimes are considered to be pass players before they are run players. But that depends on where they are lined up, if they are outside of the box of the defense then they will be pass first players, but if they play inside the box lined up behind the defensive end then they are typically a run player. One of the outside linebackers is usually called into either blitz or pass coverage to make up for the missing DB. In the NFL and college football, this alignment is used mainly in short yardage situations or near the goal line. It is commonly used in high school football.


References


Notes


Bibliography

*''Complete Book of Linebacker Play'', Joe Giampalmi, Parker Pub. Co., 1984, {{Authority control American football positions American football terminology Canadian football terminology