To be considered a sack, the quarterback must intend to throw a forward pass. If the play is designed for the quarterback to rush (run) the ball, any loss is subtracted from the quarterback's rushing total (and the play is ruled a tackle for loss as opposed to a sack). If the quarterback's intent is not obvious, statisticians use certain criteria, such as the offensive line blocking scheme, to decide. Unique situations where a loss reduces a quarterback's rushing total (not a sack) are "kneel downs" (used to run time off the game clock).
A player will receive credit for half of a sack when multiple players contribute to the sacking of a quarterback, even if more than two players contributed.
In the National Football League (NFL), it is possible to record a sack for zero yards. The NFL subtracts yards lost due to sacks from teams' passing totals (though the quarterback's individual passing total stats remain unchanged),3 while the NCAA subtracts sack yardage from individual rushing totals.4
The term sack was first popularized in the 1960s by Hall of Fame defensive end Deacon Jones, who felt that a quarterback being sacked devastated the offense in the same way that a city was devastated when it was sacked.56 In 1999, Jones provided a Los Angeles Times reporter with some other detailed imagery about his forte: "You take all the offensive linemen and put them in a burlap bag, and then you take a baseball bat and beat on the bag. You're sacking them, you're bagging them. And that’s what you're doing with a quarterback."7
According to former NFL coach Marv Levy, Washington Redskins coach George Allen may have coined the term when referring to Dallas Cowboys quarterback Craig Morton8 when he purportedly stated before a game, "Before we play those Dallas Cowboys, we’re going to take that Morton salt and pour him into a sack."
Prior to sack, the term dump was often used, as the NFL's statistical office recorded all sacks under "dumping the passer".9
The NFL only began to keep track of times passers lost yardage in 196110 and no credit was given to the defensive player responsible until 1982.11 Researcher John Turney of the Pro Football Researchers Association estimated that Jones recorded 173½ sacks in his career.12
Controversial NFL rule changes made for the 2018 season prohibit tacklers from landing on the quarterback after making a sack, with the punishment being a roughing the passer penalty.13
Of all forms of defensive pressure against the opposition's passer, sacks provide the most immediate impact by ending the offensive play.14 However, quarterbacks sometimes avoid a sack by throwing an incomplete pass or risking an interception.15 According to Football Outsiders, a quarterback hurry is the most common form of pass pressure. In the 2009 NFL season, there were 1,106 sacks and 3,268 hurries, and a hurried quarterback generally averaged fewer yards per pass play compared to the average pass play.16
These records are from 1982 onwards, the year the NFL started officially recording sacks.17
"2011 Football Statisticians Manual, p. 17" (PDF). NCAA. Retrieved October 15, 2017. http://fs.ncaa.org/Docs/stats/Stats_Manuals/Football/2011ez.pdf ↩
"Sack or Dump: To Quarterback It's All Downhill". The Milwaukee Journal. November 7, 1975. Retrieved June 5, 2013. https://news.google.com/newspapers?nid=1499&dat=19751107&id=72kaAAAAIBAJ&pg=5990,3948674 ↩
"Guide for Statisticians" (PDF). National Football League. Retrieved August 10, 2020. http://www.nflgsis.com/gsis/documentation/stadiumguides/guide_for_statisticians.pdf ↩
"2018 Football Statisticians' Manual" (PDF). National Collegiate Athletic Association. http://fs.ncaa.org/Docs/stats/Stats_Manuals/Football/2018ez.pdf ↩
"Jones, NFL coiner of 'sack the quarterback,' dies at 74". CNN. June 4, 2013. Retrieved June 5, 2013. http://www.cnn.com/2013/06/04/us/sport-deacon-jones-death/index.html ↩
#15: David 'Deacon' Jones - The Top 100: NFL's Greatest Players (2010) - #FlashbackFridays. May 13, 2016. Event occurs at 1:53 – via YouTube. https://www.youtube.com/watch?v=OqcmuCcwCiU ↩
Goldstein, Richard (June 6, 2013). "Deacon Jones Dies at 74; Made Quarterback Sack Brutal and Enthralling". The New York Times. Retrieved June 6, 2013. https://www.nytimes.com/2013/06/05/sports/football/deacon-jones-fearsome-nfl-defensive-end-dies-at-74.html?hpw ↩
Florio, Mike (June 16, 2013). "Levy explains how Deacon Jones came up with 'sack'". Profootballtalk.com. Retrieved August 10, 2020. /wiki/Mike_Florio ↩
NFL Records http://www.nfl.com/history/randf/records/indiv/passing ↩
NFL Records http://www.nfl.com/history/randf/records/indiv/sacks ↩
Branch, John (November 4, 2006). "Unofficially, Sack Record Doesn't Add Up". The New York Times. Archived from the original on September 1, 2015. https://www.nytimes.com/2006/11/04/sports/football/04giants.html ↩
Stiles, Adam (September 27, 2018). "The NFL's controversial new roughing the passer rule, explained in a 3-minute read". SBNation.com. Retrieved September 28, 2018. https://www.sbnation.com/nfl/2018/9/27/17911444/nfl-roughing-the-passer-penalty-explanation-clay-matthews ↩
Schatz, Aaron (June 1, 2010). "Examining the art of the hurry". ESPN.com. Retrieved February 2, 2014.(subscription required) https://insider.espn.com/nfl/insider/news/story?id=5238886 ↩
Long, Howie; Czarnecki, John (2011). "Football For Dummies". John Wiley & Sons. p. 166. ISBN 9781118051610. Retrieved February 2, 2014. 9781118051610 ↩
Norm Willey made 17 sacks during one game according to 1952 newspaper accounts. However, sacks weren't an official statistic at the time.[15] /wiki/Norm_Willey ↩
DeArdo, Bryan (December 28, 2023). "Steelers' T.J. Watt makes NFL history as first player to lead league in sacks three different times". CBS Sports. Retrieved March 27, 2024. https://www.cbssports.com/nfl/news/steelers-t-j-watt-makes-nfl-history-as-first-player-to-lead-league-in-sacks-three-different-times/ ↩
Edholm, Eric (December 28, 2015). "J.J. Watt becomes only two-time 20-sack player, does so on safety". Yahoo! Sports. Retrieved February 1, 2015. https://sports.yahoo.com/blogs/nfl-shutdown-corner/j-j--watt-becomes-only-two-time-20-sack-player--does-so-on-safety-210051599.html ↩
"Steelers' NFL record of 75 games with a sack ends vs. Bengals". September 27, 2021. https://www.espn.com/blog/pittsburgh-steelers/post/_/id/32807/steelers-nfl-record-of-75-games-with-a-sack-ends-vs-bengals ↩
NFL Career Sacked Leaders – Pro-Football-Reference.com https://www.pro-football-reference.com/leaders/pass_sacked_career.htm ↩
NFL Single-Season Sacked Leaders – Pro-Football-Reference.com https://www.pro-football-reference.com/leaders/pass_sacked_single_season.htm ↩
NFL Single Game Sacked Leaders – Pro-Football-Reference.com https://www.pro-football-reference.com/leaders/pass_sacked_single_game.htm ↩
L. C. Greenwood had 4 sacks in Super Bowl X.[22] However, sacks were not officially recorded by the NFL at that point. /wiki/L._C._Greenwood ↩
Heath, Jon (February 14, 2022). "Von Miller made NFL history in Super Bowl LVI". Broncos Wire. Retrieved February 14, 2022. https://broncoswire.usatoday.com/2022/02/14/super-bowl-history-von-miller-most-super-bowl-sacks/ ↩