
The 1925 National Football League (NFL) Championship, claimed by the Chicago Cardinals, has long been the subject of controversy. The controversy centers on the suspension of the Pottsville Maroons by NFL commissioner Joseph Carr, which prevented them from taking the title.

On January 11, 2015, the Dallas Cowboys and the Green Bay Packers played an NFC Divisional Playoff game at Lambeau Field in Green Bay, Wisconsin. The game gained notoriety after a play in which Cowboys wide receiver Dez Bryant attempted to catch a pass from quarterback Tony Romo in the closing minutes of the 4th quarter. The pass was initially ruled a catch before controversially being overturned after officials determined Bryant did not complete the process of a catch while he was lunging towards the end zone. The Packers would get the ball on the turnover on downs and run out the clock. They won by a score of 26–21 and moved on to the NFC Championship game. In the proceeding years, the National Football League (NFL) changed the rules regarding catching a pass while falling to the ground. The new rules would have given Bryant a completed catch. This game has gone by such names as "Dez Caught It" or the "No-Catch Game."
The 2018 NFC Championship Game was a National Football League (NFL) game played on January 20, 2019, to determine the National Football Conference (NFC) champion for the 2018 NFL season. The visiting Los Angeles Rams defeated the New Orleans Saints 26–23 in sudden death overtime to advance to their first Super Bowl since the 2001 season. The outcome, however, was mired in controversy because of unpenalized pass interference committed by Rams cornerback Nickell Robey-Coleman on Saints wide receiver Tommylee Lewis near the end of regulation, which would be nicknamed the "NOLA No-Call".

Bottlegate, also referred to as The Beer Bottle Game, was an officiating controversy in an American football game in the 2001 season of the National Football League between the visiting Jacksonville Jaguars and the Cleveland Browns.

Michael Brown is an American football executive and the owner of the Cincinnati Bengals of the National Football League (NFL), a position he has held since 1991. The son of Bengals co-founder and original coach of the Cleveland Browns, Paul Brown, he joined the Bengals upon their founding in 1968 and assumed ownership of the team after his father's death. Brown is currently the 2nd longest-tenured active general manager in the NFL, after Jerry Jones of the Dallas Cowboys, whom like Brown, serves as both the team's owner and GM.
Vontaze DeLeon Burfict Jr. is a former American football linebacker. He played college football at Arizona State. Considered the most highly ranked football prospect Arizona State ever signed to a letter of intent, Burfict was recognized as an All-American in 2010 and projected an early first round pick for the 2012 NFL Draft. However, a mediocre on-field performance and poor pre-draft workouts diminished his draft stock, resulting in him not being selected. He was subsequently signed as an undrafted free agent by the Cincinnati Bengals, where he played for seven seasons.

Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repeated blows to the head. The encephalopathy symptoms can include behavioral problems, mood problems, and problems with thinking. The disease often gets worse over time and can result in dementia. It is unclear if the risk of suicide is altered.

The Cleveland Browns relocation controversy, sometimes called "The Move" by fans, was caused by the announcement from then-Browns owner Art Modell that he intended to move the Cleveland Browns of the National Football League from its long-time home of Cleveland to Baltimore during the 1995 NFL season. Subsequent legal actions by the city of Cleveland and Browns season ticket holders led the NFL to broker a compromise that saw the Browns franchise, history, records, and intellectual property remain in Cleveland. In return, Modell was permitted to establish a new franchise in Baltimore, which was eventually named the Ravens. Since it was deemed infeasible for the Browns to play the 1996 season in Cleveland under such circumstances, the franchise was officially deactivated by the NFL in February 1996 and Modell was allowed to transfer its football organization to the Ravens. The Ravens are officially regarded by the NFL as an expansion team that began play in 1996.

Deflategate was a National Football League (NFL) controversy involving the allegation that New England Patriots quarterback Tom Brady ordered the deliberate deflation of footballs used in the Patriots' victory against the Indianapolis Colts in the 2014 American Football Conference (AFC) Championship Game. The controversy resulted in Brady being suspended for four games; the team was fined $1 million and forfeited two draft selections in 2016.

The Fail Mary, sometimes known as the Inaccurate Reception or the Intertouchdownception, was the final play of an American football game between the Green Bay Packers and Seattle Seahawks of the National Football League (NFL) that occurred on September 24, 2012, at CenturyLink Field in Seattle, Washington. In a nationally televised game on ESPN's Monday Night Football, the Seahawks defeated the Packers, 14–12, in controversial fashion.

The Heidi Game or Heidi Bowl is the name given to a 1968 American Football League (AFL) game between the Oakland Raiders and the visiting New York Jets. The contest, held on November 17, 1968, was notable for its exciting finish, in which Oakland scored two touchdowns in the final minute to win the game 43–32. However, a decision by the game's television broadcaster NBC to break away from its coverage on the East Coast to broadcast the television film Heidi resulted in many viewers missing the Raiders' comeback.
In American football, the Holy Roller was a controversial game-winning play by the Oakland Raiders against the San Diego Chargers on September 10, 1978, at San Diego Stadium in San Diego, California. It was officially ruled as a forward fumble by Raiders quarterback Ken Stabler that was recovered by his teammate, tight end Dave Casper, in the end zone for a touchdown, ultimately giving Oakland the 21–20 win. However, there have been differing interpretations of how this play should have actually been ruled, and it has remained a controversial play for fans of both teams involved. The NFL amended its rules after the 1978 season in order to prevent a recurrence of the play. Chargers fans refer to the play as the Immaculate Deception.

There has been only one player who has publicly come out as gay or bisexual while being an active player in the National Football League (NFL): Carl Nassib, who revealed himself as gay on June 21, 2021. Six former NFL players have come out publicly after they retired. Michael Sam was selected by the St. Louis Rams in the 2014 NFL Draft, and thus became the first publicly gay player drafted in the league, but was released before the start of the regular season. He became the first publicly gay player to play in the Canadian Football League in August 2015.

The Immaculate Reception is one of the most famous plays in the history of American football. It occurred in the AFC divisional playoff game of the National Football League (NFL), between the Pittsburgh Steelers and the Oakland Raiders at Three Rivers Stadium in Pittsburgh, Pennsylvania, on December 23, 1972. With the Steelers trailing in the last 30 seconds of the game, Pittsburgh quarterback Terry Bradshaw threw a pass attempt to John Fuqua. The ball either bounced off the helmet of Raiders safety Jack Tatum or off the hands of Fuqua, and, as it fell, Steelers fullback Franco Harris scooped it up and ran for a game-winning touchdown. The play has been a source of unresolved controversy and speculation ever since, as many people have contended that the ball only touched Fuqua or that it hit the ground before Harris caught it, either of which would have resulted in an incomplete pass by the rules at the time. Kevin Cook's The Last Headbangers cites the play as the beginning of a bitter rivalry between Pittsburgh and Oakland that fueled a historically brutal Raiders team during the NFL's most controversially physical era.

Richard Dominik Incognito Jr. is an American football offensive guard for the Las Vegas Raiders of the National Football League (NFL). He played college football for the University of Nebraska and was drafted by the St. Louis Rams in the third round of the 2005 NFL Draft. He played for them through the 2009 season, and also played for the Miami Dolphins and Buffalo Bills, making four Pro Bowls. After sitting out the 2018 season, Incognito signed with the Raiders.

League of Denial is a 2013 book, initially broadcast as a documentary film, about traumatic brain injury in the National Football League (NFL), particularly concussions and chronic traumatic encephalopathy (CTE). The documentary, entitled League of Denial: The NFL's Concussion Crisis, was produced by Frontline and broadcast on PBS. The book was written by ESPN reporters Mark Fainaru-Wada and Steve Fainaru. The book and film devote significant attention to the story of Mike Webster and his football-related brain injuries, and the pathologist who examined Webster's brain, Bennet Omalu. The film also looks closely at the efforts of researchers led by Ann McKee at Boston University's Center for the Study of Traumatic Encephalopathy, where the brains of a number of former NFL athletes have been examined.

The murder of Odin Lloyd occurred on June 17, 2013, in North Attleborough, Massachusetts, USA. His death made international headlines when Aaron Hernandez, at the time a tight end for the New England Patriots of the National Football League, was investigated as a suspect in the case. Lloyd had been a linebacker for a New England Football League (NEFL) semi-professional football team, the Boston Bandits, since 2007.

The Music City Miracle was an American football play that took place on January 8, 2000, during the National Football League's (NFL) 1999–2000 playoffs. It occurred at the end of the American Football Conference (AFC) Wild Card playoff game between the Tennessee Titans and Buffalo Bills at Adelphia Coliseum in Nashville, Tennessee. After the Bills had taken a 16–15 lead on a field goal with 16 seconds remaining in the game, on the ensuing kickoff return, Titans tight end Frank Wycheck threw a lateral across the field to Kevin Dyson, who then ran 75 yards to score the winning touchdown to earn a 22–16 victory.

Since the 1960s, the issue of Native American and First Nations names and images being used by sports teams as mascots has been the subject of increasing public controversy in the United States and Canada. This has been a period of rising Indigenous civil rights movements, and Native Americans and their supporters object to the use of images and names in a manner and context they consider derogatory. They have conducted numerous protests and tried to educate the public on this issue.

The NFL Color Rush was a promotion done in conjunction with the National Football League (NFL) and Nike that promotes so-called "color vs. color" matchups with teams in matchup-specific uniforms that are primarily one solid color with alternating colored accents, primarily airing on Thursday Night Football. Despite being promoted as color vs. color, some games had one team wearing traditional white uniforms, either by choice or out of necessity. The uniforms did not count against each team with regards to their allowed alternate uniform allotment. The games received mixed responses from fans, with some praising the NFL for changing up their games in terms of uniforms, while others criticized the promotion for some of its garish uniforms. The promotion was officially discontinued for the 2018 seasons, but many teams continue to wear the Color Rush uniforms and promote them heavily, notably the Cleveland Browns, New England Patriots, Seattle Seahawks, Dallas Cowboys, Pittsburgh Steelers, Buffalo Bills and Los Angeles Chargers.
The Oakland Raiders relocation to Las Vegas saw the Oakland Raiders, an American football club in the National Football League (NFL), move from their longtime home of Oakland, California, to the Las Vegas, Nevada metropolitan area. The renamed Las Vegas Raiders play home games at Allegiant Stadium in Paradise, Nevada, which was substantially completed on July 31, 2020.

Raymell Mourice Rice is a former American football running back who played in the National Football League (NFL) for six seasons with the Baltimore Ravens. He played college football at Rutgers and was drafted by the Ravens in the second round of the 2008 NFL Draft. During his professional career, Rice was named to three Pro Bowls and was a member of the 2012 Ravens team that won the franchise's second Super Bowl title in Super Bowl XLVII. He is the Ravens' second all-time leading rusher and is also second in rushing attempts and touchdowns, and third in combined touchdowns.

On April 7, 2021, six people, including two children, were shot and killed at a house in Rock Hill, South Carolina, United States. Phillip Adams, a former National Football League player, was named as the perpetrator.

The Snowplow Game was a regular-season game played between the Miami Dolphins and New England Patriots on December 12, 1982, at Schaefer Stadium in Foxborough, Massachusetts. Due to icy conditions, the game remained scoreless until late in the fourth quarter, when the snowplow operator was called in to clear a spot on the snowy field specifically for New England kicker John Smith so he could kick the game-winning field goal to give the Patriots a 3–0 win.

James George Snyder Sr., better known as Jimmy the Greek, was an American sports commentator and Las Vegas bookmaker. A regular contributor to the CBS program The NFL Today, Snyder predicted the scores of NFL games, which sports bettors used to determine the point spread. In January 1988, Snyder was fired by CBS after he made comments suggesting that breeding practices during slavery had led African-Americans to become superior athletes.

Spygate was an incident during the National Football League's (NFL) 2007 season, when the New England Patriots were disciplined by the league for videotaping New York Jets' defensive coaches' signals from an unauthorized location during a September 9, 2007 game. Videotaping opposing coaches is not illegal in the NFL, per se; there are designated areas allowed by the league to do such taping. Because the Patriots were instead videotaping the Jets' coaches from their own sideline during the game, NFL Commissioner Roger Goodell deemed it to be in violation of league rules, stating that the act represented a calculated and deliberate attempt to avoid long-standing rules designed to encourage fair play and promote honest competition on the playing field. After an investigation, the NFL fined Patriots head coach Bill Belichick $500,000 for his role in the incident, fined the Patriots $250,000, and docked the team their original first-round selection in the 2008 NFL Draft which would have been the 31st pick of the draft.

Super Bowl XXXVIII was an American football game between the National Football Conference (NFC) champion Carolina Panthers and the American Football Conference (AFC) champion New England Patriots to decide the National Football League (NFL) champion for the 2003 season. The Patriots defeated the Panthers by a score of 32–29. The game was played at Reliant Stadium in Houston, Texas, on February 1, 2004. At the time, this was the most watched Super Bowl ever with 144.4 million viewers.

The Super Bowl XXXVIII halftime show took place on February 1, 2004 at the Reliant Stadium in Houston, Texas as part of Super Bowl XXXVIII. It featured Janet Jackson, Justin Timberlake, P. Diddy, Nelly, Kid Rock, and Jessica Simpson.

The halftime show at Super Bowl XXXVIII, which was broadcast live on February 1, 2004, from Houston, Texas, on the CBS television network, is notable for a moment in which Janet Jackson's breast—adorned with a nipple shield—was exposed by Justin Timberlake to the viewing public for approximately half a second. The incident, sometimes referred to as Nipplegate or Janetgate, led to an immediate crackdown and widespread debate on perceived indecency in broadcasting.

Super Bowl XL was an American football game between the National Football Conference (NFC) champion Seattle Seahawks and the American Football Conference (AFC) champion Pittsburgh Steelers to decide the National Football League (NFL) champion for the 2005 season. The Steelers defeated the Seahawks by the score of 21–10. The game was played on February 5, 2006, at Ford Field in Detroit, Michigan. It is currently the most recent Super Bowl broadcast on ABC, and the first where all aspects of the game itself were aired in HD.

The Super Bowl LIII Halftime Show, officially known as the Pepsi Super Bowl LIII Halftime Show, took place on February 3, 2019 at Mercedes-Benz Stadium in Atlanta, Georgia, as part of Super Bowl LIII. It was headlined by American pop group Maroon 5, joined by rappers Big Boi and Travis Scott as guests.

The 2001 AFC Divisional Playoff game between the New England Patriots and the Oakland Raiders, also known as the Tuck Rule Game or the Snow Bowl, or sometimes referred to as Snow Bowl 2, took place on January 19, 2002, at Foxboro Stadium in Foxborough, Massachusetts, the former home stadium of the Patriots. The game, played under a heavy snowfall, was the last at Foxboro Stadium.

Since August 2016, some American athletes have protested against police brutality and racism by kneeling on one knee whilst the U.S. national anthem is played. Beginning in 2017, many players also protested against President Donald Trump's criticisms of those involved in the protest, and some against Trump's policies during his time in office. Some observers have described the protests as politically motivated and/or patriotic and have praised the players' social awareness, while others have criticized giving attention to social issues during sporting events, and called the protests unpatriotic or disrespectful. The act itself has become widely referred to as "taking the knee" or "taking a knee".

The Washington Redskins name controversy involved the name and logo previously used by the Washington Football Team, a National Football League (NFL) franchise located in the Washington metropolitan area. Native American groups had questioned the use of the "Redskins" name and image since the 1960s and the topic began receiving widespread public attention in the 1990s. Native Americans demanding a name change included tribal nations, national tribal organizations, civil rights organizations, and individuals. The largest of these organizations, the National Congress of American Indians, counted the enrollment of its member tribes as totaling 1.2 million individuals in 2013. The Washington team was only one example of the larger Native American mascot controversy, but it received more public attention because modern dictionaries define the name as derogatory or insulting and because the team is located in the nation's capital. After decades of resistance, in 2020 the team responded to economic pressure in wake of widespread recognition of systemic racism, dropping the Redskins name and beginning the process of rebranding the team. It has been decided that the new name will leave behind all references to Native Americans, and be announced in 2022.