Oklahoma City Thunder seasons

The Oklahoma City Thunder are a professional basketball franchise based in Oklahoma City, Oklahoma. They play in the Northwest Division of the Western Conference in the National Basketball Association (NBA); their home court is at Chesapeake Energy Arena. The Thunder's NBA Development League affiliate is the Tulsa 66ers, who are owned by the Thunder. The Thunder are the only team in the Major professional North American sports leagues located in the state of Oklahoma.

The 2009-10 Oklahoma City Thunder season was the 2nd season of the franchise's existence in Oklahoma City as a member of the National Basketball Association (NBA).

The 2019–20 Oklahoma City Thunder season was the 12th season of the franchise in Oklahoma City and the 53rd in the National Basketball Association (NBA). This is the Thunder's first season since 2007–08 without Russell Westbrook, as he was traded to the Houston Rockets for Chris Paul and future draft picks on July 11, 2019. The trade reunited Westbrook with former Thunder teammate James Harden, who had played for the team from 2009 to 2012. The trade also marked Chris Paul's first time since 2006–07 playing in Oklahoma City after playing his first two seasons there when he was a member of the New Orleans Hornets (the Hornets temporarily relocated to Oklahoma City for two seasons following the destruction caused by Hurricane Katrina in New Orleans). This trade was preceded by a trade where Paul George was sent to the Los Angeles Clippers on July 7.

The 2017–18 Oklahoma City Thunder season was the 10th season of the franchise in Oklahoma City and the 52nd in the National Basketball Association (NBA). This season was headlined by the acquisitions of All-Star players Paul George and Carmelo Anthony in trades with the Indiana Pacers and New York Knicks respectively, in addition to the reigning MVP Russell Westbrook signing a five-year extension worth $205 million. The trio was dubbed the "Big Three" as well as "OK3". The Thunder clinched their playoff berth for the eight time in the last nine seasons with a win over the Miami Heat in a rematch of the 2012 Finals on April 9, 2018.

The 2016–17 Oklahoma City Thunder season was the 9th season of the franchise in Oklahoma City and the 51st in the National Basketball Association (NBA). On the April 9, Russell Westbrook broke the record of Oscar Robertson of most triple-doubles in a season with 42. Westbrook would go on to be named the League's MVP in June.

The 2018–19 Oklahoma City Thunder season was the 11th season of the franchise in Oklahoma City and the 53rd in the National Basketball Association (NBA). Nick Collison (who had been with the franchise since it was based in Seattle), retired in May 2018 and was not on the roster for the first time since the 2002–03 season. The only remaining former SuperSonics' active players are Jeff Green and Kevin Durant, both of whom played their rookie seasons with the team in Seattle. Collison's retirement also left Russell Westbrook as the longest tenured Thunder player and last remaining player on the roster from the 2011–12 season in which they won the Western Conference and went to the NBA Finals. On March 20, 2019, the Thunder retired Collison's No. 4 jersey, becoming the first Thunder player and the last former Sonic player to have their jersey retired.

The 2015–16 Oklahoma City Thunder season is the ongoing eighth season of the franchise in Oklahoma City and the 50th in the National Basketball Association (NBA).

The 2007–08 Seattle SuperSonics season was the 41st season of the Seattle SuperSonics in the National Basketball Association (NBA) and the franchise's final season of play in Seattle, Washington before relocating to Oklahoma City to play as the Thunder. With head coach P. J. Carlesimo as replacement of Bob Hill, who was fired at the end of the previous season, the Sonics finished in 15th place in the Western Conference with a franchise worst 20–62 record. Seattle's first round draft pick and no. 2 overall Kevin Durant was chosen as the Rookie of the Year at the end of the season.

The 1978–79 Seattle SuperSonics season was the team's 12th since the franchise began, and their most successful, winning their only NBA title. This was Seattle's first professional sports championship since the Seattle Metropolitans victory in the Stanley Cup in 1917.

The 1973–74 Seattle SuperSonics season was the 7th season of the Seattle SuperSonics in the National Basketball Association (NBA). Following the resignation of Lenny Wilkens as a head coach after the 1971–72 season and a poor campaign in the 1972–73 season that saw the departure of general manager Bob Houbregs, the Sonics hired Boston Celtics' stalwart Bill Russell as head coach and general manager. With Russell at the helm, the team finished in 6th place in the Western Conference with a 36–46 record. The Sonics' home court, Seattle Center Coliseum, was the venue for the 1974 NBA All-Star Game.