In the 2005 season, Jason Garrett, who had already called it a day as a footballer, took over as Nick Saban's quarterbacks coach for the Miami Dolphins.
The Dallas Cowboys appointed Garrett as their offensive coordinator in January 2007. He led the Cowboys to the second-best offense in the league, making him a desirable candidate for head coaching.
In the winter of 2008, Garrett started to receive head-coaching opportunities, so Dallas rewarded him, and he became the highest-paid assistant in football with a contract of about $3 million.
In 2010, Garrett advanced to interim head coach status when Wade Phillips was sacked midseason. In January 2010, Garrett was given a permanent position.
In three years as head coach, the Dallas offensive unit placed among the top 10 in the league in terms of total offense, placing second in 2007, tenth in 2010, and second in 2009. Under Garrett, the offense saw high productivity levels in several areas.
The Cowboys finished 8-8 and lost a de facto NFC East championship contest in each of his first three years in charge. He led the group to the NFC East championship in three of the following five seasons. Garrett's Cowboys only won two of their five games in three playoff outings and failed to advance past the divisional round.
Jason Garrett left the Dallas Cowboys with an 85-67 regular-season mark and a 2-3 postseason record.
He had two seasons with ten or more victories: a 13-win performance in 2016 and a 12-win campaign in 2014. The Cowboys secured the top seed in the NFC in 2016 with 13 wins. Additionally, Garrett received the 2016 NFL Coach of the Year honors.
Jason Garrett oversaw the careers of Dak Prescott, DeMarco Murray, Jason Witten, Tony Romo, Ezekiel Elliott, and offensive linemen Tyron Smith, Zack Martin, and Travis Frederick while serving as head coach.
After a dismal 2019 season in which his team missed the playoffs, the Cowboys dismissed Garrett in January 2020, ending his tenure as Dallas' head coach.
Jason Garrett enjoyed a short stint at New York Giants
When the Dallas Cowboys fired him, Jason Garrett was the head coach with the second-longest stay in team history. Later that month, Garrett met with Joe Judge, the head coach of the New York Giants at the time.
From 2020 to 2021, he was the Giants' offensive coordinator. His time with the team resulted in scoring the fewest touchdowns in the league, leading to his dismissal after the team's Week 11 loss to the Tampa Bay Buccaneers by a 30-10.
Following his termination as the offensive coordinator for the New York Giants, he joined the Football Night in America cast on NBC. He took over for former New Orleans Saints quarterback Drew Brees, who quit the network following a lackluster debut year.