|
Formation (American Football)
A formation in American football refers to the position players line up in before the start of a Down (American football), down. There are both offensive and defensive formations and many in both categories. Sometimes, formations are referred to as packages. Offense At the highest level of play in the National Football League, NFL and National Collegiate Athletic Association, NCAA, the one constant in all formations is the offensive lineman, offensive line, consisting of the left and right tackle (American football position), tackle, left and right guard (football), guard, and a Center (gridiron football), center. These five positions are often referred to collectively as the "line", and have the primary role of blocking. By rule, there must be two additional players on the line of scrimmage called End (gridiron football), ends. These players are eligible receivers and may play near the linemen (tight ends) or further away (split end or wide receiver). Most teams play additional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Football
American football, referred to simply as football in the United States and Canada and also known as gridiron football, is a team sport played by two teams of eleven players on a rectangular American football field, field with goalposts at each end. The offense (sports), offense, the team with possession of the oval-shaped Ball (gridiron football), football, attempts to advance down the field by Rush (gridiron football), running with the ball or Forward pass#Gridiron football, throwing it, while the Defense (sports), defense, the team without possession of the ball, aims to stop the offense's advance and to take control of the ball for themselves. The offense must advance the ball at least ten yard, yards in four Down (gridiron football), downs or plays; if they fail, they turnover on downs, turn over the football to the defense, but if they succeed, they are given a new set of four downs to continue the Glossary of American football#drive, drive. Points are scored primarily b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line Of Scrimmage
In gridiron football, a line of scrimmage is an invisible 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 of the most recent play and following the assessment of any penalty yards. History The line of scrimmage first came into use in 1880. Developed by Walter Camp (who introduced many innovations that are part of the modern game of American football), it replaced a contested scrimmage that had descended from the game's rugby roots. This uncontested line of scrimmage would set into motion many more rules that led to the formation of the modern form of gridiron football (although the Canadian rules were developed independently of the American game, despite their similarities). Dimensions A line of scrimmage is parallel to the goal lines and touches one edge of the ball where it sits on the ground before the snap. In American football, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linebacker
Linebacker (LB) is a playing position in gridiron football. Linebackers are members of the defensive team, and typically line up three to five yards behind the line of scrimmage and so back up the defensive linemen. They play closer to the line of scrimmage than the defensive backs (secondary). 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 linebackers play their positions 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 is frequently the "quarterback of the defense". His central role on the field means he is in the best positio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-platoon System
The one-platoon system, also known as "iron man football", is a platoon system, rule-driven substitution pattern in American football whereby the same players were expected to stay on the field for the entire game, playing both offense and defense as required. Players removed for a substitute were lost to their teams for the duration of the half (until 1932) or quarter (until 1941). Existing alternatively is the two-platoon system (or simply the "platoon system"), which makes use of separate offensive and defensive units. (In the contemporary game third platoons of special teams players for kicking situations are also used). Each system has been used at different times in American college football and in the National Football League. In the college game, the major rules switch allowing two platoons came ahead of the 1941 season — a change first emulated by the NFL in 1943. Due to budgetary pressures associated with expanded scholarship and travel costs, member schools of the N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penalty (American Football)
In gridiron football, a penalty is a sanction assessed against a team for a violation of the rules, called a foul. Officials initially signal penalties by tossing a bright yellow colored penalty flag onto the field toward or at the spot of a foul. Many penalties result in moving the football toward the offending team's end zone, usually in 5 yard increments. Penalties may go as high as 25 yards depending on the penalty and league. Most penalties against the defensive team also result in the offense receiving an automatic first down, while a few penalties against the offensive team cause them to automatically lose a down. In some cases, depending on the spot of the foul, the ball is moved half the distance to the goal line rather than the usual number of yards, or the defense scores an automatic safety. Rationale Because football is a high-contact sport requiring a balance between offense and defense, many rules exist that regulate equality, safety, contact, and actions of pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defensive Back
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 defensive linemen who play directly on the line of scrimmage, and the linebackers, who play in the middle of the defense, and between the defensive line and the defensive backs. Among all the defensive backs, there are two main types, cornerbacks, which play nearer the line of scrimmage and the sideline, whose main role is to cover the opposing team's wide receivers, and the Safety (gridiron football position), safeties, who play further back near the center of the field, and who act as the last line of defense. American defensive formations usually includes two of each, a left and right cornerback, as well as a strong safety and a free safety, with the free safety tending to play further back than the strong safety. In Canadian football, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linebacker
Linebacker (LB) is a playing position in gridiron football. Linebackers are members of the defensive team, and typically line up three to five yards behind the line of scrimmage and so back up the defensive linemen. They play closer to the line of scrimmage than the defensive backs (secondary). 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 linebackers play their positions 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 is frequently the "quarterback of the defense". His central role on the field means he is in the best positio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defensive Lineman
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 (OL), while linemen on the opposing team are the defensive line (DL). A number of National Football League (NFL) rules specifically address restrictions and requirements for the offensive line, whose job is to help protect the quarterback from getting Quarterback sack, sacked for a loss or Fumble, 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. Offensive line The offensive line (OL) consists of the Center (American football), center, who is responsible for Snap (gridiron football), snapping the ball into play, two Guard (American football), guards who flank the center, and two offensive tac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Football
Canadian football, or simply football, is a Sports in Canada, sport in Canada in which two teams of 12 players each compete on a field long and wide, attempting to advance a Ball (gridiron football), pointed oval-shaped ball into the opposing team's end zone. Canadian and American football, American football have shared origins and are closely related, but have some major comparison of American and Canadian football, differences. Canadian football is played with three downs, goalposts in the front of the endzone, and twelve players on each side. Comparatively, American football has four downs, goalposts in the back of the endzone, and eleven players on each side. Canadian football is also played on a bigger field. Rugby football, from which Canadian football developed, was first recorded in Canada in the early 1860s, taken there by British immigrants, possibly in 1824. Both the Canadian Football League (CFL), the sport's top professional league, and Football Canada, the go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arena Football
Arena football is a variety of gridiron football designed to be played indoors. The game is played on a smaller field than American or Canadian football, designed to fit in the same surface area as a standard North American ice hockey rink, and features between six and eight players for each team playing at any given time depending on the league, resulting in a faster and higher-scoring game that can be played on the floors of indoor arenas. The sport was invented in 1981, and patented in 1987, by Jim Foster, a former executive of the National Football League and the United States Football League. The name is trademarked by Gridiron Enterprises and had a proprietary format until its patent expired in 2007. Three leagues have played under official arena football rules: the Arena Football League, which played 32 seasons in two separate runs from 1987 to 2008 and 2010 to 2019; arenafootball2, the AFL's erstwhile developmental league, which played 10 seasons from 2000 through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snap (football)
A snap (also called a "hike", "snapback", or "pass from center") is the backward passing of the ball in gridiron football at the start of play from scrimmage. Action The ball begins on the ground with its long axis parallel to the sidelines of the field, its ends marking each team's line of scrimmage in American football; in Canadian football, the line of scrimmage of the team without the ball is 1 yard past their side of the ball. The player snapping the ball (known officially as the "snapper" in rule books) delivers the ball to another player, and that action is the snap. The snapper may hand, throw, or even roll the ball to the other player. The snap must be a quick and continuous movement of the ball by one or both hands of the snapper, and the ball must leave the snapper's hands. The various rules codes have additional requirements, all of which have the effect of requiring the ball to go backward. The snapper almost always passes the ball between his legs, but only i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motion (football)
In gridiron football, motion refers to the movement of an offensive player at the time of the snap. While there are different rules regarding motion, most mandate that no more than one player may be in motion at the time of the snap, and the player must not be an offensive lineman (typically, the player in motion is a wide receiver or running back). Additionally, the NFL (professional), NCAA (college), and NFHSAA (high school) require that they be moving laterally or backwards; they are not allowed to be moving towards the line of scrimmage when the ball is snapped. The Canadian Football League allows for motion towards the line of scrimmage at the time of the snap, as did the Arena Football League. The Indoor Football League allows two offensive players to engage in forward motion. Motion and shift There is a distinction drawn between a ''shift'' and ''motion'' in football. Motion occurs when a player is moving ''at the time of the snap''. A shift occurs when one or more pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
