||Reason for leaving
||Wilks was fired on December 31, 2018, after one season in which he accrued a record of 3–13 (.188).He later joined the Cleveland Browns as a defensive coordinator.Kingsbury, who had spent most of the previous six seasons as head coach of Texas Tech, was hired on January 8, 2019.
||Lewis and the Bengals mutually agreed to part ways on December 31 after a 6–10 (.375) season. In 16 years as the Bengals’ head coach, Lewis was 131–122–3 (.518), with 7 playoff appearances. Famously, the Bengals never won a playoff game under Lewis and had missed the playoffs in each of his last three seasons.Lewis joined NFL Network as a commentator for Alliance of American Football games shortly after his departure.Taylor was officially named as head coach on February 5, 2019. This is his first experience as head coach after serving as the Los Angeles Rams’ quarterbacks coach and at 35 years old, is now currently the 2nd youngest active coach in the NFL, after Sean McVay, whom coaches Taylor’s former team, the Rams.
||Jackson was fired on October 29, 2018, accumulating a 3–36–1 (.088) record during his 2½-season tenure with the Browns. Jackson failed to win any away games during his tenure and lost every game in 2017.He rejoined the Cincinnati Bengals as an assistant coach immediately after his firing. Defensive coordinator Gregg Williams finished out the 2018 season with a 5–3 (.625) record. Released by the Browns on January 9, 2019, Williams later joined the New York Jets as a defensive coordinator.Kitchens was promoted to head coach on January 12, 2019, after serving as the interim offensive coordinator following Jackson’s firing. This is his first head coaching position.
||Joseph was fired on December 31, 2018, after a 6–10 (.375) season. The Broncos were 11–21 (.344) in Joseph’s two losing seasons as head coach, with no playoff appearances.He joined the Arizona Cardinals as a defensive coordinator.Fangio, a first-time head coach with over 30 years experience as an assistant dating back to the USFL, most recently as defensive coordinator of the Chicago Bears, was hired on January 10, 2019.
|Green Bay Packers
||McCarthy was fired on December 2, 2018, shortly after the Packers’ loss to the Arizona Cardinals. McCarthy leaves with a record of 135–85–2 (.613) with nine playoff appearances and one Super Bowl championship. Philbin, the team’s offensive coordinator, finished the season as interim coach with a record of 2–2 (.500).LaFleur was hired on January 8, 2019. Previously the offensive coordinator for the Tennessee Titans in 2018, this is his first head coaching position.
||Gase was fired on December 31, 2018, after a 7–9 (.438) season. The Dolphins were 23–25 (.479) in Gase’s three years as head coach, with one playoff appearance in 2016. He was later hired by Dolphins’ division rivals, the New York Jets, as head coach.Flores, formerly the New England Patriots’ long time assistant, recently as linebackers coach, was announced as head coach on February 5, 2019. After being with the Patriots organization since their 2004 Super Bowl-winning season, this is his first head coaching position.
|New York Jets
||Bowles was fired on December 30, 2018, finishing the season with a record of 4–12 (.250) and a cumulative record of 24–40 (.375) with no playoff appearances in four seasons with Jets. He joined the Tampa Bay Buccaneers as a defensive coordinator.Gase, who was previously the head coach of the Miami Dolphins, posting a 23–25 (.479) record in three seasons, was hired on January 11, 2019.
|Tampa Bay Buccaneers
||Koetter was fired on December 30, 2018, after a 5–11 (.313) season. The Buccaneers were 19–29 (.396) in Koetter’s three years as head coach, with no playoff appearances. Previously, Koetter was Buccaneers’ offensive coordinator for one season in 2015. He rejoined the Atlanta Falcons as an offensive coordinator.Arians was announced as the Buccaneers’ new head coach on January 8, 2019. He was previously the head coach for the Arizona Cardinals for five seasons with 49–30–1 (.619) record from 2013 to 2017, leading them to an NFC Championship Game appearance in 2015.