The 2013 season was the San Francisco 49ers' 64th in the National Football League (NFL), 68th overall and 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 the 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 Arizona Cardinals' 98th in the National Football League (NFL), their 30th in Arizona and their 12th at University of Phoenix Stadium. It was also the fifth and final season under head coach Bruce Arians. The Cardinals played one road game in London at Twickenham Stadium against the Los Angeles Rams as one of the NFL London Games. They improved on a 7–8–1 season they had in 2016, finishing 8–8 as they spent most of the season alternating between wins and losses. However, they missed the playoffs for the second straight season.
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 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 San Francisco 49ers' 70th in the National Football League (NFL), their 74th overall and their third under the head coach-general manager tandem of Kyle Shanahan and John Lynch. They finished their 2019 season with a 13–3 record, their best finish since 2011. Starting the season 8–0 for the first time since 1990, the 49ers surpassed their win totals from the 2016, 2017, and 2018 seasons combined. The 49ers were the second straight NFC West team to start 8–0, with the other being the 2018 Rams. With a Week 11 win over the Arizona Cardinals, the 49ers clinched their first winning season since 2013. Despite a loss to the Atlanta Falcons in Week 15, the 49ers clinched a playoff spot for the first time since 2013 with a Los Angeles Rams loss. The 49ers beat the Cardinals for the first time since 2014, won in Seattle for the first time since 2011, and beat the Panthers in the regular season for the first time since 2001.
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. They improved from their 8–8 season from the previous year with a 23–13 victory over the Seattle Seahawks in Week 11. The Cardinals started 7–0 for the first time in 47 years when they were based in St. Louis. With their week 11 win over their division rivals, the Seattle Seahawks, the Cardinals improved on their record from the previous year 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 via tiebreaker. Despite a 5–2 start, key injuries to Geno Smith, Kenneth Walker III, DK Metcalf, Devon Witherspoon, and poor defensive play led to the Seahawks losing five of their next six. While the Seahawks would win two games in a row, a loss to the Steelers cost them control of their own destiny. In total, Seattle played 11 games and went 3–8 against teams that finished with a winning record, culminating in a collapse that cost them an appearance in the postseason. This was the second time in three seasons that Seattle missed the playoffs. This was the first season since 2009 that Dave Canales was not on the team's payroll, as the Tampa Bay Buccaneers hired him to be their offensive coordinator for one year.
The 2024 season is 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. They attempt to improve on their 9–8 record from the previous two seasons, make the playoffs after a one-year absence, and end their three-year NFC West title drought. This is their first season since 2009 that Pete Carroll will not be head coach of the team, as he was reassigned to an advisor role in the offseason.