MIA Dolphins

The Miami Dolphins joined the American Football League (AFL) when an expansion franchise was awarded to lawyer Joseph Robbie and actor Danny Thomas in 1965 for $7.5 million, although Thomas would eventually sell his stake in the team to Robbie. During the summer of 1966, the Dolphins' training camp was in St. Pete Beach with practices in August at Boca Ciega High School in Gulfport.

The Dolphins were the worst team with a 15–39–2 record in their first four seasons under head coach George Wilson, before Don Shula was hired as head coach. Shula was a Paul Brown disciple who had been lured from the Baltimore Colts, after losing Super Bowl III two seasons earlier to the AFL's New York Jets, and finishing 8–5–1 the following season. Shula got his first NFL coaching job from then-Detroit head coach George Wilson, who hired him as the defensive coordinator. The AFL merged with the NFL in 1970, and the Dolphins were assigned to the AFC East division in the NFL's new American Football Conference.

For the rest of the 20th century, the Shula-led Dolphins emerged as one of the most dominant teams in the NFL, with only two losing seasons between 1970 and 1999. They were extremely successful in the 1970s, completing the first complete perfect season in NFL history by finishing with a 14–0 regular-season record in 1972 and winning the Super Bowl that year. It was the first of two consecutive Super Bowl wins and one of three appearances in a row. The 1980s and 1990s were also moderately successful. The early 80s teams made two Super Bowls despite losing both times and saw the emergence of future Hall of Fame quarterback Dan Marino, who went on to break numerous NFL passing records, holding many of them until the late 2000s. After winning every game against the division rival Buffalo Bills in the 1970s, the two teams gradually developed a competitive rivalry in the 80s and 90s, often competing for AFC supremacy when Jim Kelly emerged as the quarterback for the Bills. The Dolphins have also maintained a strong rivalry with the New York Jets throughout much of their history.

Following the retirements of Marino and Shula and the rise of Tom Brady and the New England Patriots, the Dolphins suffered a decline in the 2000s and 2010s. During this period, the team's level of play was largely described as mediocre. They have only made the playoffs four times since Marino's retirement and have largely been unable to find a consistent quarterback to replace him.

Jimmy Johnson was hired to replace Shula prior to the 1996 season. In his first season at the helm, he led the team to a 8–8 record and missed the postseason. In the 1997, the team improved to a 9–7 mark and made the postseason. The team saw their season end in the Wild Card Round with a 17–3 loss to the New England Patriots. In the 1998 season, the team went 10–6 and made the postseason. The Dolphins defeated the Bills 24–17 in the Wild Card Round before falling to the Denver Broncos 38–3 in the Divisional Round. In the 1999 season, the Dolphins went 9–7 and made the postseason. The team defeated the Buffalo Bills 24–17 in the Wild Card Round before falling 62–7 to the Jacksonville Jaguars in what would be quarterback Dan Marino's final game. Johnson resigned following the season.

Going into the 2000 season, the Dolphins named Dave Wannstedt as head coach. In his first season with the Dolphins, he led the team to a 11–5 record and an AFC East title. The team defeated the Indianapolis Colts 23–17 in the Wild Card Round before losing 27–0 to the Oakland Raiders in the Divisional Round. In the 2001 season, the team made the postseason with a 11–5 record and runner-up placement in the AFC East. The team lost to the Baltimore Ravens 20–3 in the Wild Card Round. In the 2002 season, the team failed to make the postseason despite a 9–7 record. In the 2003 season, the team went 10–6 but missed the postseason. Following a 1–8 start in the 2004 season, Wannstedt resigned. Jim Bates finished out the year with a 3–4 mark.

Nick Saban coached the Dolphins in the 2005 and 2006 seasons. He went 9–7 and 6–10 in those two seasons, missing the playoffs in both. Saban resigned following the 2006 season to leave for the University of Alabama.

Prior to the 2007 season, the Dolphins hired Cam Cameron has head coach. The team suffered a franchise-worst 1–15 season in 2007. After the 2007 season, the team fired Cameron.

Tony Sparano was named head coach of the Dolphins prior to the 2008 season. In his first season, he led the team to an 11–5 result and an AFC East title. During the season, they became the second team to make a 10-game improvement over the previous season. That same season, the Dolphins upset the New England Patriots on the road during Week 3 thanks to the use of the gimmick Wildcat offense, which handed the Patriots their first regular-season loss since December 10, 2006, in which coincidentally, they were also beaten by the Dolphins. However, this success in 2008 proved to be an outlier during this period in the franchise's history; to date, it is the last season the Dolphins won the AFC East. The team's season ended with a 27–9 loss to the Baltimore Ravens in the Wild Card Round. The 2009 and 2010 seasons saw regression with a 7–9 record in both years. After a 4–9 start to the 2011 season, Sparano was fired. Todd Bowles finished the 6–10 season as interim coach.

Prior to the 2012 season, the team hired Joe Philbin as head coach. In his first season at the helm, Philbin led the team to a 7–9 record. In the 2013, the team improved to a 8–8 record but still missed the postseason. In the 2014 season, the team added Bill Lazor as offensive coordinator. The Dolphins once again finished 8–8. After a 1–3 start to the 2015 season, Philbin was fired. Dan Campbell was named as interim coach and finished the year with a 5–7 mark.

Prior to the 2016 season, the team hired Adam Gase as head coach. He led the team to a 10–6 record and a postseason berth in the 2016 season. The team's season ended with a 30–12 loss to the Pittsburgh Steelers in the Wild Card Round. In the 2017 season, the Dolphins regressed to a 6–10 record. In the 2018 season, the Dolphins finished with a 7–9 record. After a cumulative 23–25 record, Gase was fired by the Dolphins.

Prior to the 2019 season, the Dolphins hired Brian Flores as head coach. He led the team to a 5–11 record in the 2019 season. The team drafted Alabama quarterback Tua Tagovailoa in the first round of the 2020 NFL Draft. In the 2020 season, the team improved to a 10–6 mark but still missed the postseason. In the 2021 season, the team went 9–8 but missed the postseason. Following the end of the 2021 season, Flores was fired as head coach.

Prior to the 2022 season, Mike McDaniel was hired as head coach. In his first season, he led the Dolphins to a 9–8 record and a 34–31 loss to the Bills in the Wild Card Round. In the 2023 season, the team improved to a 11–6 mark but the season again ended in the Wild Card Round with a 26–7 loss to the Kansas City Chiefs.