BUF Bills

The Bills began competitive play in 1960 as a charter member of the American Football League led by head coach Buster Ramsey and joined the NFL as part of the AFL–NFL merger in 1970. In the first two seasons, the Bills went 5–8–1 and 6–8 under Ramsey. The Bills won two consecutive American Football League titles in 1964 and 1965 with quarterback Jack Kemp and coach Lou Saban, but the club has yet to win a league championship since.

Once the AFL–NFL merger took effect, the Bills became the second NFL team to represent the city; they followed the Buffalo All-Americans, a charter member of the league. Buffalo had been left out of the league since the All-Americans (by that point renamed the Bisons) folded in 1929; the Bills were no less than the third professional non-NFL team to compete in the city before the merger, following the Indians/Tigers of the early 1940s and an earlier team named the Bills, originally the Bisons, in the late 1940s in the All-America Football Conference (AAFC).

Following the AFL–NFL merger, the Bills were generally mediocre in the 1970s but featured All-Pro running back O. J. Simpson. After being pushed to the brink of failure in the mid-1980s, the collapse of the United States Football League and a series of highly drafted players such as Jim Kelly (who initially played for the USFL instead of the Bills), Thurman Thomas, Bruce Smith and Darryl Talley allowed the Bills to rebuild into a perennial contender in the late 1980s through the mid-1990s under head coach Marv Levy, a period in which the team won four consecutive AFC Championships; the team nevertheless lost all four subsequent Super Bowls, records in both categories that still stand.

The rise of the division rival New England Patriots under Bill Belichick and Tom Brady, along with numerous failed attempts at rebuilding in the 2000s and 2010s, helped prevent the Bills from reaching the playoffs in seventeen consecutive seasons between 2000 and 2016, a 17-year drought that was the longest active playoff drought in all major professional sports at the time.

Mike Mularkey coached the Bills in the 2004 and 2005 seasons. He went 9–7 but missed the postseason in 2004 and 5–11 in 2005. He resigned from the team following the 2005 season.

From 2006 to 2009, the Bills were coached by Dick Jauron. Following three consecutive 7–9 seasons, Jauron was dismissed after a 3–6 start to his fourth season. Perry Fewell finished out the season as interim with a 3–4 mark.

From 2010 to 2012, the Bills were coached by Chan Gailey. The team had Ryan Fitzpatrick as their quarterback in those seasons. Gailey was fired after three consecutive last place finishes in the AFC East.

Doug Marrone was hired to be the Bills' head coach prior to the 2013 season. The Bills went 6–10 in the 2013 season and improved to 9–7 in the 2014 season. Marrone decided to step down as head coach following the season. On October 8, 2014, Buffalo Sabres owners Terry and Kim Pegula received unanimous approval to acquire the Bills during the NFL owners' meetings, becoming the second ownership group of the team after team founder Ralph Wilson.

Prior to the 2015 season, the team hired former Jets' head coach Rex Ryan to become the next head coach of the Bills. The team went 8–8 in 2015 and 7–9 in 2016. Ryan was dismissed with one game remaining in the 2016 season, with Anthony Lynn finishing the season as interim.

Under head coach Sean McDermott, the Bills broke the playoff drought, appearing in the playoffs for four of the next five seasons. The team drafted Wyoming quarterback Josh Allen with the seventh overall pick in the first round of the 2018 NFL Draft. The team earned its first division championship and playoff wins since 1995 during the 2020 season, aided by Brady's departure to Tampa Bay and out of the AFC East, as well as the Bills' own development of a core of talent including Allen, Stefon Diggs, Matt Milano, and Tre'Davious White. In the 2020 season, the Bills reached the AFC Championship for the first time since the 1993 season. However, their run ended with a 38–24 loss to the Kansas City Chiefs. The Bills won the AFC East with a 11–6 record in the 2021 season. The Bills defeated the Patriots 47–17 in the Wild Card Round before falling to the Kansas City Chiefs 42–36 in overtime. In the 2022 season, the Bills won the AFC East with a 13–3 record. The season saw a cancelled game against the Bengals due to a near-fatal medical episode with Damar Hamlin, who eventually recovered and returned to football activities the following season. The team defeated the Miami Dolphins in the Wild Card Round 34–31 before falling to the Cincinnati Bengals 27–10 in the Divisional Round. In the 2023 season, the Bills won the AFC East for the fourth consecutive season. In the Wild Card Round, they defeated the Pittsburgh Steelers 27–17 before falling to the Kansas City Chiefs in the Divisional Round 27–24. The Buffalo Bills have also announced the plans to build a new stadium to replace Highmark Stadium in 2026.