The Thunder enter the offseason off one of the greatest seasons in NBA history, having won 68 regular-season games and clinched their first world title since relocating from Seattle. 

After winning the NBA championship, Oklahoma City faced minimal roster turnover, yet completed a flurry of transactions. 

The Thunder began the offseason by trading rookie forward Dillon Jones and a 2029 second-round pick to the Washington Wizards for guard Colby Jones, who was later released. 

Some smaller moves followed, as the Thunder gave the qualifying offer to guard Ajay Mitchell and declined center Jaylin Williams’ player option to re-sign the third-year center to a four-year,$24 million contract. 

On July 1, 2025, reigning league MVP and finals MVP Shai Gilgeous-Alexander and the Thunder agreed on a four-year, $285 million contract, which was the largest annual salary for the time. Shai Gilgeous-Alexander had completed his best season to date, putting up averages of 32.7 points per game, 5.0 rebounds per game, and 6.4 assists per game. Shai made history by joining an impressive club by winning the regular season MVP and finals MVP in the same season. 

In addition to Shai’s massive contract extension, the Thunder gave Jalen Williams and Chet Holmgren maximum rookie contract extensions. 

Jalen Williams received a five-year contract that could be worth as high as $287 million, and Chet Holmgren received a five-year contract that could be worth as high as $250 million.

Jalen Williams, known for his elite two-way ability, came off his best season as a pro. 

The third-year guard averaged coming off a season making the All-Star team, the All-NBA third-team, and the All-NBA defensive second-team. Chet Holmgren, known for his elite defensive abilities, started the season off rough, as he injured his hip early and missed 50 regular-season games. However, the third-year big man ended the season off strong, helping the Thunder win the championship and leading the league's best defense throughout the postseason. 

Rounding off the off-season came the NBA draft. The Thunder had three picks in this year’s draft, which ultimately became two after trading the 24th overall pick to the Sacramento Kings in exchange for their 2027 first-round pick. The Thunder ended up drafting Georgetown center Thomas Sorber with the 15th overall pick in the first round, and Northwestern forward Brooks Barnhizer with the 44th overall pick in the second round.