The 2013 season was the San Francisco 49ers' 64th in the National Football League (NFL), their 68th overall and their third under the head coach/general manager tandem of Jim Harbaugh and Trent Baalke. This marked the first season since 2004 that quarterback Alex Smith was not on the roster as he joined the Kansas City Chiefs. This was the 49ers' final season playing their home games at Candlestick Park before moving into Levi's Stadium for the 2014 season.
The 2016 season was the San Francisco 49ers' 67th in the National Football League (NFL), their 71st overall, their third playing their home games at Levi's Stadium and their only season under head coach Chip Kelly. The season saw the 49ers attempting to rebound from their 5–11 record the previous year, but finished 2–14, with their only wins coming against their division rival Los Angeles Rams. The 49ers also nearly became the first team since the 2001 Carolina Panthers to win their opener and lose the remainder of their games, prior to the 49ers' Week 16 win over the Rams. The 49ers' record was their worst since 2004, when they also finished 2–14. The 49ers' 1–7 home record tied the worst home record in franchise history. As a result, the 49ers fired Kelly and general manager Trent Baalke.
The 2017 season was the Seattle Seahawks' 42nd in the National Football League (NFL) and their eighth under head coach Pete Carroll. The Seahawks tried to improve their 10–5–1 record from 2016. However, it did not happen because of injuries to key defensive players and poor offensive performances. After the Atlanta Falcons' Week 17 win over the Carolina Panthers, they were eliminated from playoff contention for the first time since 2011. They also failed to achieve a 10-win season for the first time since that same season. This was Russell Wilson's first season not making the playoffs.
The 2018 season was the Arizona Cardinals' 99th in the National Football League (NFL), their 31st in Arizona, and their only season under head coach Steve Wilks. During the off-season, State Farm purchased the naming rights to the Cardinals' home stadium and it was renamed from University of Phoenix Stadium to State Farm Stadium. Although former head coach Bruce Arians retired before the season began, he came out of retirement on January 8, 2019 to become the new coach of the Tampa Bay Buccaneers.
The 2018 season was the Seattle Seahawks' 43rd in the National Football League (NFL) and their ninth under head coach Pete Carroll. The Seahawks improved on their 9–7 record from the 2017 season, finishing 10–6, the sixth time in seven years that they recorded at least ten wins in a season. They also played in London for the first time in franchise history, defeating the Oakland Raiders 27–3 in Week 6. With a win over the Kansas City Chiefs and eventual league MVP Patrick Mahomes in Week 16, the Seahawks returned to the playoffs; their seventh appearance in the nine seasons under Carroll. However, the Seahawks suffered their first one-and-done postseason campaign since 2004, as they fell to the Dallas Cowboys in the Wild Card round 24–22.
The 2019 season was the Arizona Cardinals' 100th in the National Football League (NFL), their 32nd in Arizona and their first under head coach Kliff Kingsbury, following the firing of former head coach Steve Wilks the previous season. During the offseason, the Cardinals' home stadium was renamed from University of Phoenix Stadium to State Farm Stadium. The Cardinals were one of two current teams, along with the Chicago Bears, who were among the 14 charter members of the American Professional Football Association, which later became the NFL, that celebrated its 100th season in 2019.
The 2019 season was the Seattle Seahawks' 44th in the National Football League (NFL) and their 10th under head coach Pete Carroll. It marked their first full season since 1996 without longtime owner Paul Allen, who had died during the 2018 season.
The 2020 season was the Arizona Cardinals' 101st in the National Football League (NFL), their 33rd in Arizona and their second under head coach Kliff Kingsbury. It was also the first full season since 1971 without the ownership of Bill Bidwill, who died during the 2019 season.
The 2020 season was the Seattle Seahawks' 45th in the National Football League (NFL) and their 11th season under head coach Pete Carroll. With a win over the Washington Football Team in Week 15, the Seahawks made the playoffs for the third consecutive year. With a Week 17 win over the San Francisco 49ers, they improved upon their 11–5 record from the previous season. For the first time in franchise history, the Seahawks started 5–0. After a Week 16 win over the Los Angeles Rams, the Seahawks clinched the NFC West title for the first time since 2016.
The 2021 season was the Chicago Bears' 102nd season in the National Football League (NFL), their 103rd overall, and their fourth and final under head coach Matt Nagy. This was the first season under the NFL's new 17-game schedule.
The 2021 season was the Arizona Cardinals' 102nd season in the National Football League (NFL), their 34th in Arizona and their third under head coach Kliff Kingsbury. The Cardinals started 7–0 for the first time in 47 years when they were based in St. Louis. They improved from their 8–8 season from the previous year with a 23–13 victory over the Seattle Seahawks in Week 11 and clinched their first winning season since 2015. Despite a loss to the Indianapolis Colts in Week 16, the Cardinals clinched a playoff berth for the first time since 2015 after the Minnesota Vikings lost to the Los Angeles Rams.
The 2021 season was the San Francisco 49ers' 72nd season in the National Football League (NFL), their 76th overall and their fifth under the head coach/general manager tandem of Kyle Shanahan and John Lynch. In honor of the 75th anniversary of the team's founding in 1946, the 49ers introduced a commemorative logo to be used during this season.
The 2021 season was the Seattle Seahawks' 46th season in the National Football League (NFL), their 20th playing their home games at their current venue, Lumen Field, as well as their 12th under head coach Pete Carroll.
The 2022 season was the Arizona Cardinals' 103rd in the National Football League (NFL), their 35th in Arizona, and their fourth and final under head coach Kliff Kingsbury. They attempted to become the third straight team in NFL history to host and win the Super Bowl as that year's Super Bowl was held at State Farm Stadium. However, they failed to improve upon their 11–6 record from the previous year after a Week 11 loss to the San Francisco 49ers and missed the postseason after a Week 15 loss against the Denver Broncos.
The 2022 season was the San Francisco 49ers' 73rd in the National Football League (NFL), their 77th overall, and their sixth under the head coach/general manager tandem of Kyle Shanahan and John Lynch.
The 2023 season was the Arizona Cardinals' 104th season in the National Football League (NFL) and the first under new head coach Jonathan Gannon and general manager Monti Ossenfort. The Cardinals matched their 4–13 record from the previous year after an upset win over the Philadelphia Eagles in Week 17. The team also introduced new uniforms for the first time since the 2005 season.
The 2023 season was the San Francisco 49ers' 74th in the National Football League (NFL), their 78th overall, their tenth playing their home games at Levi's Stadium and their seventh under the head coach/general manager tandem of Kyle Shanahan and John Lynch. This was the team's first season since 2013 and 2016, respectively, without safety Jimmie Ward and quarterback Jimmy Garoppolo on the roster; Garoppolo signed with the Las Vegas Raiders on March 17, while Ward signed with the Houston Texans the following day.
The 2023 season was the Seattle Seahawks' 48th in the National Football League (NFL) and their 14th and final season under the head coach/general manager tandem of Pete Carroll and John Schneider. The Seahawks matched their 9–8 record from the previous year, but unlike 2022, it was not enough to qualify for the playoffs, as they finished in third place in the division behind the San Francisco 49ers and Los Angeles Rams, and in a three-way tie with the Green Bay Packers and New Orleans Saints for the last Wild Card spot, which the Packers claimed on a strength of victory tiebreaker.
The 2024 season was the Arizona Cardinals' 105th in the National Football League (NFL), their 37th in Arizona and their second under the head coach/general manager tandem of Jonathan Gannon and Monti Ossenfort. The Cardinals improved on their 4–13 record from the previous 2 seasons following a Week 9 victory against the Chicago Bears. However, they suffered their fourth late season collapse in five years and were eliminated from playoff contention for the third consecutive season after an overtime loss to the Carolina Panthers coupled with the Los Angeles Rams beating the New York Jets in Week 16. They would secure a losing record for the third consecutive season following a loss against the Rams in Week 17.
The 2024 season was the Seattle Seahawks' 49th in the National Football League (NFL), their 15th under general manager John Schneider and their first under head coach Mike Macdonald. The team improved their win records from the previous two seasons; however, the Seahawks missed the playoffs in consecutive seasons for the first time since 2008–2009. The Seahawks finished tied with the Los Angeles Rams for the NFC West division title, but the Rams won the division based on the strength of victory tiebreaker. This was also the second straight season the Seahawks missed a playoff spot by the strength of victory tiebreaker. They were the first team since the 2020 Miami Dolphins to miss the playoffs despite having double-digit wins. This was their first season since 2009 that Pete Carroll was not the head coach of the team, as he was reassigned to an advisor role in the offseason.