In American football, a spy is a defensive player assigned to cover an offensive backfield player man-to-man when they are expected to engage in a running play, but the offensive player does not run with the ball immediately.
This strategy is generally used with "dual-threat" quarterbacks who may be expected to run on their own after expected passing plays break down, with the defensive player floating near the line of scrimmage, following the quarterback's movements.
Spies are also sometimes known as "keys".Generally, spies are linebackers.
The quarterback, 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 American football, the quarterback is usually considered the leader of the offense, and is often responsible for calling the play in the huddle. The quarterback also touches the ball on almost every offensive play, and is the offensive player that almost always throws forward passes. When the QB is tackled behind the line of scrimmage, it is called a sack.
In gridiron football, a lineman is a player who specializes in play at the line of scrimmage. The linemen of the team currently in possession of the ball are the offensive line, while linemen on the opposing team are the defensive line. A number of NFL rules specifically address restrictions and requirements for the offensive line, whose job is to help protect the quarterback from getting sacked for a loss, or worse, fumbling. The defensive line is covered by the same rules that apply to all defensive players. Linemen are usually the largest players on the field in both height and weight, since their positions usually require less running and more strength than skill positions.
A cornerback (CB) is a member of the defensive backfield or secondary in gridiron football. Cornerbacks cover receivers most of the time, but also blitz and defend against such offensive running plays as sweeps and reverses. They create turnovers through hard tackles, interceptions, and deflecting forward passes.
A linebacker is a playing position in gridiron football. Linebackers are members of the defensive team, and line up approximately three to five yards behind the line of scrimmage and behind the defensive linemen. They represent the "middle ground" of defenders, playing closer to the line of scrimmage than do the defensive backs, but further back than do 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 or a defensive back. How a linebacker plays their position depends greatly on the defensive alignment, the philosophy of the coaching staff, and the particular play the offense may call.
In gridiron football, a sack occurs when the quarterback is tackled behind the line of scrimmage before he can throw a forward pass, when the quarterback is tackled behind the line of scrimmage in the "pocket" and his intent is unclear, or when a passer runs out of bounds behind the line of scrimmage due to defensive pressure. This often occurs if the opposing team's defensive line, linebackers or defensive backs are able to apply pass pressure to quickly get past blocking players of the offensive team, or if the quarterback is unable to find a back to hand the ball off to or an available eligible receiver to catch the ball, allowing the defense a longer opportunity to tackle the quarterback.
In gridiron football, blitzing is a tactic used by the defense to disrupt pass attempts by the offense. During a blitz, a higher than usual number of defensive players will rush the opposing quarterback, in an attempt either to tackle him or force him to hurry his pass attempt.
Strategy forms a major part of American football. Both teams plan many aspects of their plays (offense) and response to plays (defense), such as what formations they take, who they put on the field, and the roles and instructions each player are given. Throughout a game, each team adapts to the other's apparent strengths and weaknesses, trying various approaches to outmaneuver or overpower their opponent in order to win the game.
In American football, a bootleg play is a play in which the quarterback runs with the ball in the direction of either sideline behind the line of scrimmage. This can be accompanied by a play action, or fake hand off of the ball to a running back running the opposite direction.
Center (C) is a position in gridiron football. The center is the innermost lineman of the offensive line on a football team's offense. The center is also the player who passes the ball between his legs to the quarterback at the start of each play.
A trick play, also known as a gadget play, gimmick play or trickeration, is a play in gridiron football that uses deception and unorthodox tactics to fool the opposing team. A trick play is often risky, offering the potential for a large gain or a touchdown if it is successful, but with the chance of a significant loss of yards or a turnover if not. Trick plays are rarely used not only because of the riskiness, but also to maintain the element of surprise for when they are used.
A halfback (HB) is an offensive position in American football, whose duties involve lining up in the backfield and carrying the ball on most rushing plays, i.e. a running back. When the principal ball carrier lines up deep in the backfield, and especially when that player is placed behind another player, as in the I formation, that player is instead referred to as a tailback.
Safety, historically known as a safetyman, is a position in gridiron football which is played by a member of the defense. The safeties are defensive backs who line up from ten to fifteen yards from the line of scrimmage who can play as linebackers or deep as normal safeties. There are two variations of the position in a typical American formation: the free safety (FS) and the strong safety (SS). Their duties depend on the defensive scheme. The defensive responsibilities of the safety and cornerback usually involve pass coverage towards the middle and sidelines of the field, respectively. While American (11-player) formations generally use two safeties, Canadian (12-player) formations generally have one safety and two defensive halfbacks, a position not used in the American game. As professional and college football have become more focused on the passing game, safeties have become more involved in covering the eligible pass receivers.
The split-T is an offensive formation in American football that was popular in the 1940s and 1950s. Developed by Missouri Tigers head coach Don Faurot as a variation on the T formation, the split-T was first used in the 1941 season and allowed the Tigers to win all but their season-opening match against the Ohio State Buckeyes and the 1942 Sugar Bowl versus Fordham. Jim Tatum and Bud Wilkinson, who coached under Faurot with the Iowa Pre-Flight Seahawks during World War II, brought the split-T to the Oklahoma Sooners in 1946. After Tatum left for Maryland in 1947, Wilkinson became the head coach and went on to win a record-setting 47 straight games and two national titles between 1953 and 1957.
James Ninowski, Jr., aka "Nino," is a former American football quarterback in the National Football League for the Cleveland Browns, Detroit Lions, Washington Redskins and New Orleans Saints of the National Football League. He played college football at Michigan State University and was drafted in the fourth round of the 1958 NFL Draft.
In American football, a 4–3 defense is a defensive alignment consisting of four down linemen and three linebackers. It is called a "base defense" because it is the default defensive alignment used on "base downs". However, defenses will readily switch to other defensive alignments as circumstances change. Alternatively, some defenses use a 3–4 defense.
The following terms are used in American football, both conventional and indoor. Some of these terms are also in use in Canadian football; for a list of terms unique to that code, see Glossary of Canadian football.
Nathan Scheelhaase is a former college football quarterback and coach. He is currently the wide receivers coach for the Iowa State University football team. He was the starting quarterback for the Illinois Fighting Illini from 2010 to 2013. While playing at Rockhurst High School, he won the 2008 Missouri Gatorade Player of the Year.
Skill positions in gridiron football are the positions that ordinarily handle the ball and are most responsible for scoring points. Offensive players such as quarterbacks, running backs, and wide receivers are typically considered skill positions, as are tight ends on occasion.
Sean Ryan is an American football coach and former player. He is currently the quarterbacks coach for the Carolina Panthers of the National Football League (NFL). Ryan is considered by many NFL insiders to be one of the best up-and-coming offensive coaches in the league and is often cited for his development of young players.
In gridiron football, a dual-threat quarterback, also known as a running quarterback, is a quarterback who possesses the skills and physique to run with the ball if necessary. With the rise of several blitz heavy defensive schemes and increasingly faster defensive players, the importance of a mobile quarterback has been redefined. While arm power, accuracy, and pocket presence – the ability to successfully operate from within the "pocket" formed by his blockers – are still the most important quarterback virtues, the ability to elude or run past defenders creates an additional threat that allows greater flexibility in the team's passing and running game. Overall, the dual-threat quarterback has been referred to as "the most complex position in sports" by Bleacher Report.