Yards After Catch (YAC) is the term used in American football for the distance gained by a receiver after catching a pass. Specifically, it is the forward yardage gained from the spot of the reception until the receiver is downed, runs out of bounds, scores, or loses the ball.
[This entry is out of date. It does not note that the website is no longer active, although old content is still available.] Advanced Football Analytics (formerly Advanced NFL Stats) is a website dedicated to the analysis of the National Football League (NFL) using mathematical and statistical methods. The site's lead author is noted football researcher and analyst Brian Burke. Burke is a regular contributor to The New York Times' NFL coverage, The Washington Post's Redskins coverage, and supplies research for other notable publications and writers.Advanced Football Analytics features a variety of analytical techniques and applications. The site predicts game outcomes and rates teams using a logistic regression model based on team efficiency statistics. It also features a live in-game win probability model that estimates the chances either opponent will win a game in progress. Advanced Football Analytics uses its win probability model to analyze strategic coaching decisions such as whether to kick or attempt first down conversions.
Research topics include game theory applications, luck and randomness, play calling, home field advantage, run-pass balance, and the relative importance of various facets of performance (offensive passing, offensive rushing, defensive passing, etc.). Also featured is research on weather factors, team payroll, and the NFL Draft.
The site has pioneered other analytical concepts such as Air Yards, which is the distance forward of the line of scrimmage that a pass travels. It removes the contribution of Yards After Catch (YAC) run by a receiver.
Advanced Football Analytics also features a catalog of unique individual player stats. Each player's contribution toward his team's wins, known as Win Probability Added (WPA), is available for each season since 2000. Expected Points Added (EPA), success rate (SR), and many other innovative metrics are available.
During the NFL off-season, Burke has posted original research related to other North American professional sports leagues.Blitz (gridiron football)
In American football or Canadian 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, to try to tackle the quarterback or force them to hurry their pass attempt.In practice, a blitz involves five or more players rushing during a single down, rather than the four rushers used during normal play. For example, in a defense that normally uses four defensive linemen to rush, a blitz can be created by adding one or more linebackers or defensive backs.Blitzing is a higher-risk strategy, as fewer defensive players are left to cover receivers or to defend against running plays. However, a successful blitz will result in a sack or will force the quarterback into making an error.Completion (American football)
In American football, a completion occurs when a receiver successfully catches a pass. The three possible outcomes of a pass thrown are completion, incompletion, and interception. Statistically, a completed pass is recorded as a pass completion for the player who throws the ball, and as a reception for the player catching the ball. The yardage gained is the total yardage gained when the play ends, and may be subdivided into Air Yards, the distance from the line of scrimmage to the spot where the ball was caught, and Yards After Catch, the distance from where the ball was caught to where the play ends or where the player carrying the ball is out of bounds.Conversion (gridiron football)
The conversion, try (American football, also known as a point(s) after touchdown, PAT, or extra point), or convert (Canadian football) occurs immediately after a touchdown during which the scoring team is allowed to attempt to score one extra point by kicking the ball through the uprights in the manner of a field goal, or two points by bringing the ball into the end zone in the manner of a touchdown.
Attempts at a try or convert are scrimmage plays, with the ball initially placed at any point between the hash marks, at the option of the team making the attempt. The yard line that attempts are made from depends on the league and the type of try or convert being attempted.
If the try or convert is scored by kicking the ball through the uprights, the team gets an additional one point for their touchdown, bringing their total for that score from six points to seven. If two points are needed or desired, a two-point conversion may be attempted by running or passing from scrimmage. A successful touchdown conversion from scrimmage brings the score's total to eight.
Whether a team goes for one or two points, most rules regarding scrimmage downs, including scoring touchdowns and field goals, apply as if it were a normal American fourth-down or Canadian third-down play. Exceptions, including cases where the defense forces a turnover during a conversion attempt, vary between leagues and levels of play. One thing that sets the try apart from other plays in the NFL is that, apart from the actual points, ordinary statistics are not recorded on the try as they would be on a regular scrimmage play. For example, on December 4, 2016, Eric Berry of the Kansas City Chiefs made an interception on a try and physically returned it 99 yards for a defensive two-point conversion. However, because it occurred on a try, Berry did not get statistical credit for the 99 yards of return yardage; nor would a player ever be credited with passing, rushing, or receiving yardage on a try.Cornerback
A cornerback (CB), also referred to as a corner or defensive halfback in older parlance, is a member of the defensive backfield or secondary in American and Canadian football. Cornerbacks cover receivers most of the time, to defend against offensive plays, i.e create turnovers in best case or (more common) deflect a forward pass or rather make a tackle. Other members of the defensive backfield include the safeties and occasionally linebackers. The cornerback position requires speed, agility, and strength. A cornerback's skillset typically requires proficiency in anticipating the quarterback, backpedaling, executing single and zone coverage, disrupting pass routes, block shedding, and tackling. Cornerbacks are among the fastest players on the field.Demetrius Williams
Demetrius Terrell Williams (born March 28, 1983) is a former American football wide receiver. He was drafted by the Baltimore Ravens in the fourth round of the 2006 NFL Draft. He played college football at Oregon.Don Meredith
Joseph "Dandy" Don Meredith (April 10, 1938 – December 5, 2010) was an American football quarterback, sports commentator and actor. He spent all nine seasons of his professional playing career (1960–1968) with the Dallas Cowboys of the National Football League (NFL). He was named to the Pro Bowl in each of his last three years as a player. He subsequently became a color analyst for NFL telecasts from 1970–1984. As an original member of the Monday Night Football broadcast team on the American Broadcasting Company (ABC), he famously played the role of Howard Cosell's comic foil. Meredith was also an actor who appeared in a dozen films and in seven major television shows, some of which had him as the main starring actor. He is probably familiar to television audiences as Bert Jameson, a recurring role he had in Police Story.Golden Tate
Golden Herman Tate III (born August 2, 1988) is an American football wide receiver for the New York Giants of the National Football League (NFL). He played college football at Notre Dame, where he was recognized as an All-American, and was drafted by the Seattle Seahawks in the second round of the 2010 NFL Draft. He has also played for the Philadelphia Eagles and Detroit Lions, with whom he made a Pro Bowl.Interception
In ball-playing competitive team sports, an interception or pick is a move by a player involving a pass of the ball—whether by foot or hand, depending on the rules of the sport—in which the ball is intended for a player of the same team but caught by a player of the opposing team, who thereby usually gains possession of the ball for their team. It is commonly seen in football, including American and Canadian football, as well as association football, rugby league, rugby union, Australian rules football and Gaelic football, as well as any sport by which a loose object is passed between players toward a goal.
In basketball, a pick is called a steal.Jarvis Landry
Jarvis Charles Landry (born November 28, 1992) is an American football wide receiver for the Cleveland Browns of the National Football League (NFL). He played college football at Louisiana State University for the LSU Tigers and was drafted by the Miami Dolphins in the second round of the 2014 NFL Draft. With the Dolphins, Landry made three Pro Bowls and led the league in receptions in 2017. His 400 career receptions are the most by a player through his first four seasons in NFL history.Muffed punt
In gridiron football, a muffed punt is defined as "touching of the ball prior to possessing the ball.”
A muffed punt occurs when there is an "uncontrolled touch" of the football by a player on the returning team after it is punted. This can occur when:
The kicking team interferes with the other team's right to catch the punt
A player on the kicking team is struck unaware by the football running down-field to cover the punt.
A player attempts to return the ball, makes contact with it but cannot retain the ball in his hands and it comes loose.
To be a fumble, the receiving team must possess the football, then lose control. In the case of a fumble, the ball is live and can be returned by the team that recovers the ball. In the case of a muffed punt, it is possible for the punting team to recover the ball and continue the drive, but at least in NCAA and NFL rules, they cannot advance the ball on that same play. Rules vary by league about how to handle a muffed punt.
Nonetheless, a muffed punt is a turnover. In the NFL, a muffed punt recovered by the kicking team cannot be challenged by a coach for review because all turnovers are automatically reviewed.Punter (football)
A punter (P) in American or Canadian football is a special teams player who receives the snapped ball directly from the line of scrimmage and then punts (kicks) the football to the opposing team so as to limit any field position advantage. This generally happens on a fourth down in American football and a third down in Canadian football. Punters may also occasionally take part in fake punts in those same situations, when they throw or run the football instead of punting.Quarterback
A quarterback (commonly abbreviated "QB"), colloquially known as the "signal caller", is a position in American and Canadian football. Quarterbacks are members of the offensive team and line up directly behind the offensive line. In modern American football, the quarterback is usually considered the leader of the offensive team, 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.Tony Driver
Tony Danielle Driver (born August 4, 1977) is a former American football defensive back that played for the Buffalo Bills of the National Football League (NFL). He was selected in the sixth round of the 2001 NFL Draft. He played for the Bills in 2001 and 2002. Driver played college football at the University of Notre Dame.Total quarterback rating
Total quarterback rating (abbreviated as total QBR or simply QBR) is a proprietary statistic created by ESPN in 2011 to measure the performance of quarterbacks in American football. It incorporates all of a quarterback’s contributions to winning, including how he impacts the game on passes, rushes, turnovers, and penalties. Since QBR is built from the play level, it accounts for a team’s level of success or failure on every play to provide the proper context, then allocates credit to the quarterback and his teammates to produce a clearer measure of quarterback efficiency. It was created to be a more meaningful alternative to the passer rating but has been met with criticism among fans and commentators alike.Two-point conversion
In American and Canadian football, a two-point conversion or two-point convert is a play a team attempts instead of kicking a one-point conversion immediately after it scores a touchdown. In a two-point conversion attempt, the team that just scored must run a play from scrimmage close to the opponent's goal line (5-yard line in amateur Canadian, 3-yard line in professional Canadian, 3-yard line in amateur American, 2-yard line in professional American; in professional American football, there is a small dash to denote the line of scrimmage for a two-point conversion; it was the previous line of scrimmage for a point after kick until 2014) and advance the ball across the goal line in the same manner as if they were scoring a touchdown. If the team succeeds, it earns two additional points on top of the six points for the touchdown, for a total of eight points. If the team fails, no additional points are scored. In either case, if any time remains in the half, the team proceeds to a kickoff.
Various sources estimate the success rate of a two-point conversion to be between 40% and 55%, significantly lower than that of the extra point, though if the higher value is to be believed, a higher expected value is achieved through the two-point conversion than the extra point.Wide receiver
A wide receiver, also referred to as wideouts or simply receivers, is an offensive position in American and Canadian football, and is a key player. They get their name because they are split out "wide" (near the sidelines), farthest away from the rest of the team. Wide receivers are among the fastest players on the field. The wide receiver functions as the pass-catching specialist.YAC
YAC is a three-letter abbreviation with multiple meanings, as described below:
Yeast artificial chromosome
Youth Advisory Committee of Cuyahoga County
Youth Advisory Council
York Against Cancer
Yards after catch, a term in American football
The Yale Alley Cats, an all-male a cappella group
The IATA code for Cat Lake AirportYou might also be looking for Yak (disambiguation).Zone defense in American football
Zone coverage (also referred to as a zone defense) is a defense scheme in American and Canadian football used to protect against the pass.
Zone coverage schemes require the linebackers and defensive backs to work together to cover certain areas of the field, making it difficult for the opposing quarterback to complete passes. Zone defenses will generally require linebackers to cover the short and midrange area in the middle of the field, in front of the safeties. In the case where one or two linebackers blitz, the remaining linebacker(s) expands his zone to cover the zone responsibilities of the vacating linebacker(s). Often, blitzing will leave larger holes in the pass defense, but it is a gamble the defensive coordinator wants to make to pressure the quarterback into a poor decision and hopefully an interception or at least an incompletion.
Gridiron football concepts
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