Instruct: Given a question, retrieve relevant documents that can help answer the question.
Query: How much time is in each quarter of an American football game?
Football games last for a total of 60 minutes in professional and college play and are divided into two-halves of 30 minutes and four-quarters of 15 minutes. High school football games are 48 minutes in length with two-halves of 24 minutes and four-quarters of 12 minutes. The two-halves are separated by a halftime period, and the first and third quarters are also followed by a short break. Prior to the start of the game, the referee and team captains for each team meet at midfield for a coin toss. The visiting team is allowed to call 'heads' or 'tails'; the winner of the toss is allowed to decide between choosing whether to receive or kick off the ball or choosing which goal they want to defend, but they can also defer their choice until the second half. The losing team, unless the winning team decides to defer, is allowed to choose the option the winning team did not select, and receives the option to receive, kick, or select a goal to defend to begin the second half. Most teams choose to receive or defer, because choosing to kick the ball to start the game would allow the other team to choose which goal to defend. Teams switch goals following the first and third quarters. If a down is in progress when a quarter ends, play continues until the down is completed.
In American football each team has 11 players on the field at one time. The specific role that a player takes on the field is called their "position". Under the modern rules of American football, teams are allowed unlimited substitutions; that is, teams may change any number of players after any play. This has resulted in the development of three "platoons" of players: the offense (the team with the ball, which is trying to score), the defense (the team trying to prevent the other team from scoring, and to take the ball from them), and the special teams (who play in kicking situations). Within those platoons, various specific positions exist depending on what each player's main job is.
The Sports Broadcasting Act of 1961 and Public Law 89-800, which govern the antitrust exemptions given to the National Football League, prohibit the broadcasting of NFL games within 75 miles of any high school football game on Friday nights between September and early December. Because most populated areas of the United States have at least one high school football game within a 75-mile radius, and because broadcasting is an integral part of the NFL's business model (roughly half of the league's revenue comes from television contracts), this effectively prohibits the playing of NFL games in competition with high school football. (These rules do not apply during preseason, when Friday night games are common, nor does it apply at the end of the season, though the only time regular season games are played on Friday in the NFL is on Christmas.) Only recently have national sports television channels fully capitalized on this rule; since 2005, the ESPN family of networks (usually the sub-networks ESPN2, ESPNU and online broadcaster ESPN3, although the main channel also shows occasional games) has aired regular season matchups between nationally ranked teams under the "High School Showcase" banner. Fox Sports 1 also included high school football in its lineup when it launched in 2013.
A game lasts thirty-six minutes, and is split up into three twelve-minute periods. Unlike association football, in professional matches the referee is not the sole arbiter of the end of a period. A separate timekeeping official controls the official game clock, which is stopped for stoppages in play, and typically counts down to zero, as in North American sports such as basketball and ice hockey. Draws are not permitted, with the game going into three minutes of extra time, followed by a penalty shootout if the score is still on level terms after normal time. Unlike football, penalty kicks are decided by sudden death rules.
In American football since the 1950s, most upper level teams use a three-platoon system, each with its own starting lineup. The starting lineups for offense and defense, each with eleven players, typically get the most attention. The starting lineups are defined as the eleven players who take the first offensive or defensive play from scrimmage of a given game. (An offensive player does not have to be on the team that gets possession first to be considered a starter, nor does a defensive player have to be on the team that does not; the first play from scrimmage after the first change of possession counts as well.) The third platoon, special teams, in modern times is composed mostly of backup and reserve players from the offensive or defensive platoons, with the exception of the placekicker or punter; the players who, for instance, take part in the opening kickoff are typically not considered starters.
NBC broadcast the first televised National Football League (NFL) game when they carried the 22 October 1939 game between the Philadelphia Eagles and the Brooklyn Dodgers. The same year, the first nationwide radio broadcast of an NFL championship game was carried on the Mutual Broadcasting System. While the NFL had weak television deals that ranked behind college football and even the Canadian Football League in the 1950s, the broadcast rights of the NFL would go on to become an important property following the 1958 NFL Championship and the later establishment of the American Football League in 1960. "Monday Night Football", "NFL on Fox", and "NBC Sunday Night Football" have changed the landscape of American football broadcasts, including the scheduling of the Super Bowl, transforming it from an afternoon broadcast into a primetime spectacle. The price for the NFL's broadcast rights has increased steadily over the past several decades, in part because of bidding wars between the numerous networks and the fear of losing stature due to the loss of NFL programming; as of the most recent contract the league nets annual fees of over $6 billion, or half of the league's overall revenue, from television rights alone. Four of the five major sports television units in the United States, and the four companies that control all of the major broadcast networks, currently own some NFL rights.
The game itself features international level soccer matchups and customizable options that makes a game anywhere from a length of a childhood soccer match (3 minute halves) to the length of an actual FIFA soccer match (45 minute halves). As long as they can remember the lengthy passwords, players can also make their own soccer teams. The game announcer's uses brief words and phrases to describe the action (i.e., kick-off, yellow card, red card, penalty shot, head shot, header, rainbow kick).
The regular season is 21 weeks long, with games beginning in mid-June and finishing by early November. The CFL's nine current teams are divided into two divisions: the East Division with four teams and the West Division, with five teams. Each team plays two games against each of the other eight teams, plus two divisional games with opponents rotating each season. With 18 regular season games being played, each team gets three bye weeks.
Teams do not play a given conference opponent from outside their division more than once during the regular season. However, they may meet again for a second time in the playoffs. The NFL schedules divisions to play against each other on a rotating basis, so that every team from one division will play every team from another division, for a total of four games per team. Each team will also play one team from each of the remaining two divisions within the conference that finished in the same divisional standing position in the prior year—for a grand total of 20 conference games. Conference games are often important, as a team's record in common games, as well as its overall record against its conference, is sometimes used as a tiebreaker for playoff seeding at the end of the regular season. Also, many regular season opponents have met again in the playoffs, and the result of a regular season game can affect where the playoff game will be played. Conference rivals will play each other at least once every three years in the regular season, and as frequently as once every year depending on record, and can play each other in the preseason.
Each AFC team plays the other teams in their respective division twice (home and away) during the regular season, in addition to 10 other games assigned to their schedule by the NFL. Two of these games are assigned on the basis of a particular team's final divisional standing from the previous season. The remaining 8 games are split between the roster of two other NFL divisions. This assignment shifts each year and will follow a standard cycle. Using the 2012 regular season schedule as an example, each team in the AFC West plays against every team in the AFC North and NFC South. In this way, non-divisional competition will be mostly among common opponents – the exception being the two games assigned based on the team's prior-season divisional standing.
Currently, the thirteen opponents each team faces over the 16-game regular season schedule are set using a pre-determined formula.
Each NFC team plays the other teams in their respective division twice (home and away) during the regular season, in addition to 10 other games assigned to their schedule by the NFL. Two of these games are assigned on the basis of a particular team's final divisional standing from the previous season. The remaining 8 games are split between the roster of two other NFL divisions. This assignment shifts each year and will follow a standard cycle. Using the 2012 regular season schedule as an example, each team in the NFC West plays against every team in the AFC East and NFC North. In this way, non-divisional competition will be mostly among common opponents – the exception being the two games assigned based on the team's prior-season divisional standing.
The rival American Football League arose in 1960 and challenged the NFL's dominance. The AFL began in relative obscurity but eventually thrived, with an initial television contract with the ABC network. The AFL's existence forced the conservative NFL to expand to Dallas and Minnesota in an attempt to destroy the new league. Meanwhile, the AFL introduced many new features to Professional Football in the United States: official time on the scoreboard clock, rather than on a watch in the referee's pocket, as the NFL did; optional two-point conversions by pass or run after touchdowns; names on the jerseys of players; and several others, including expansion of the role of minority players, actively recruited by the league in contrast to the NFL. The AFL also signed several star college players that had also been drafted by NFL teams. Competition for players heated up in 1965, when the AFL New York Jets signed rookie Joe Namath to a then-record US$437,000 contract. A five-year, $40 million NBC television contract followed, which helped to sustain the young league. The bidding war for players ended in 1966, when NFL owners approached the AFL regarding a merger, and the two leagues agreed on one that would take full effect in 1970. This agreement provided for a common draft that would take place each year, and it instituted an annual World Championship game to be played between the champions of each league. That game began play at the end of the 1966 season. Once the merger was completed, it was no longer a championship game between two leagues, and reverted to the NFL championship game, which came to be known as the Super Bowl.
The American Football League stands as the only professional football league to successfully compete against the NFL. When the two leagues merged in 1970, all ten AFL franchises and their statistics became part of the new NFL. Every other professional league that had competed against the NFL before the AFL–NFL merger had folded completely: the three previous leagues named "American Football League" and the All-America Football Conference. From an earlier AFL (1936–1937), only the Cleveland Rams (now the Los Angeles Rams) joined the NFL and are currently operating, as are the Cleveland Browns and the San Francisco 49ers from the AAFC. A third AAFC team, the Baltimore Colts (not related to the 1953–1983 Baltimore Colts or to the current Indianapolis Colts franchise), played only one year in the NFL, disbanding at the end of the 1950 season. The league resulting from the merger was a 26-team juggernaut (since expanded to 32) with television rights covering all of the Big Three television networks and teams in close proximity to almost all of the top 40 metropolitan areas, a fact that has precluded any other competing league from gaining traction since the merger; failed attempts to mimic the AFL's success included the World Football League (1974–75), United States Football League (1983–85), XFL (2001) and United Football League (2009–2012).
While the rivalry faded in national importance in the mid-2010s, the contests themselves were quite memorable, as four UF-UT games in a row featured a dramatic fourth quarter rally.Series record sources: "2011 Florida Gators Football Media Guide", "2011 Tennessee Football Media Guide", and College Football Data Warehouse.
There have been no perfect seasons (or even perfect regular seasons) in the American Association, World Football League, United States Football League, XFL, or, to date, the Arena Football League. The United Football League has had two perfect regular seasons, but neither qualify for the list: the 2009 Florida Tuskers finished 6–0, but that team lost the subsequent championship game; the 2012 Las Vegas Locomotives had a record of 4–0 when the league abruptly suspended operations halfway through the season.
Super Bowl XXXIX was an American football game played between the American Football Conference (AFC) champion New England Patriots and the National Football Conference (NFC) champion Philadelphia Eagles to decide the National Football League (NFL) champion for the 2004 season. The Patriots defeated the Eagles by the score of 24–21. The game was played on February 6, 2005, at Alltel Stadium in Jacksonville, Florida, the first time the Super Bowl was played in that city.
The New York Giants took possession with four seconds left and ran out the clock for a 20–19 victory, making this Super Bowl the closest ever. Had Norwood successfully scored it would have likely given the Bills a 22–20 victory, and it would also have been the first Super Bowl to be decided by a game-ending field goal since Jim O'Brien's 32-yard kick which gave the Baltimore Colts a 16–13 victory against the Dallas Cowboys in Super Bowl V.
Gridiron football does not operate on a league system. Different professional leagues play by very different sets of rules in different seasons (the NFL plays 11-a-side on a 100-yard field in autumn and early winter, the CFL uses 12-a-side on a 110-yard field in summer and early fall, while arena football and the minor indoor leagues each play 8-a-side on a 50-yard field in the spring and early summer). There have been attempts at forming true minor leagues for the professional game (most recently with 2017's The Spring League); none so far have been able to balance the major leagues' requests with the ability to maintain financial solvency.
American teams use eleven players, while Canadian teams have twelve players on the field per side. Both games have the same number of offensive players required at the line of scrimmage, so the twelfth player in the Canadian game plays a backfield position on offence, whereas this is usually a defensive back on defence.
The sport is played on a grass field between 80 and 100 yards long and 50 to 65 yards wide. The goal area is a semicircular line with an 11-yard radius and the penalty mark at 13 yards from the goal. An experimental rule has a second semicircular line on the field with a 17-yard radius. Generally, a field for gridiron football or soccer can be used.
There have been proposals to expand the regular season schedule to 17 or 18 games per team. Current Commissioner Roger Goodell has said he favors expanding it to 18 games. However, a longer regular season proposal was defeated in the 2011 labor negotiations between the owners and the players association. One of the proposals for the 17th and 18th games is to have every team play at least one game abroad every year. Another idea being put forth by Houston Texans owner Bob McNair is to move the traditional regional rivalries that are currently played in the preseason (such as the Governor's Cups) into a permanent annual part of each NFL team's schedule. The NFL Players' Association opposes extending the season, largely because of injury concerns, and extending the season would require that such an extension be included in the next collective bargaining agreement. The collective bargaining agreement signed in 2011 maintained the sixteen game regular season schedule.
Collegiate and professional football games are 60 minutes long, divided into four quarters of 15 minutes each. In high school football, 12 minute quarters are usually played. The clock is stopped frequently, however, with the result that a typical college or professional game can exceed three hours in duration. The referee controls the game clock and stops the clock after any incomplete pass or any play that ends out of bounds. In addition, each team is allowed 3 timeouts in each half that they may use at their own discretion. The clock normally runs during the action of plays, with a few exceptions known as untimed plays.
The game consists of two 30-minute halves, each of which is divided into two 15-minute quarters. The clock counts down from 15:00 in each quarter. Timing rules change when there are three minutes remaining in a half.
A short break interval of 2 minutes occurs after the end of each quarter (a longer break of 15 minutes at halftime), and the two teams then change goals.
The National Collegiate Athletic Association's mercy rule provides, "Any time during the game, the playing time of any remaining period or periods and the intermission between halves may be shortened by mutual agreement of the opposing head coaches and the referee." (NCAA Football Rule 3-2-2-a) NCAA Football Approved Ruling 3-2-2-I cites an example: "At halftime the score is 56–0. The coaches and the referee agree that the third and fourth quarters should be shortened to 12 minutes each. The coaches also request that the second half be played with a 'running clock' i.e., that the game clock not be stopped." The NCAA Football Rules Committee determined, "The remaining quarters may be shortened to 12 minutes each. However, the 'running clock' is not allowed; normal clock rules apply for the entire game."
In the National Football League (NFL) & Alliance of American Football (AAF), the two-minute warning is given when two minutes of game time remain on the game clock in each half of a game, i.e. near the end of the second and fourth quarters. The suspension of play is two minutes long, the same as the short two-minute intermissions between quarters within each half. There is an additional two-minute warning in the rare event only two minutes remain in an overtime period. However, in the postseason, where games continue indefinitely if there is no score, there is no two-minute warning in the first overtime, but if the second overtime, or any subsequent even overtime, is still tied with two minutes remaining (which has never happened), there will be a two-minute warning. If the football is in play when the clock reaches 2:00, the two-minute warning is called immediately after the play concludes, when the ball is declared dead. The two-minute warning stops the game clock in all cases.