The Oklahoma City Thunder and Cason Wallace have agreed to a five-year, $139 million extension, according to a Field Level Media report published by Reuters on Monday.
The agreement keeps a key perimeter defender in Oklahoma City as his role expands following Lu Dort’s departure. Wallace had been approaching restricted free agency next summer.
The Reuters report credited ESPN with first reporting the deal, citing Wallace’s agents at Excel Sports Management. The extension follows his selection to the All-Defensive Second Team.
Wallace is due to earn $7.42 million in 2026–27 before the new agreement begins. He averaged career highs in scoring, assists and steals during the previous season.
The timing carries practical significance: Oklahoma City has reached an agreement before Wallace could enter the restricted market, while retaining a player expected to take on more responsibility.
NBA.com’s coverage identified Wallace as the expected backcourt partner for Shai Gilgeous-Alexander after Dort’s trade. He also earned All-Rookie Second Team recognition in 2024 during his debut season.
His defensive impact has become central to that progression. Wallace led the league in steals and deflections last season, contributing 8.6 points per game across 77 appearances.
He shot 35.6% from 3-point range in that campaign. The combination of perimeter defense and outside shooting provides the basketball context for Oklahoma City’s long-term investment in him.
Sportsnet reported that he averaged 3.1 rebounds and 2.6 assists, shooting 43.2%. Oklahoma City won 64 games to lead the Western Conference.
He appeared in all 15 of the Thunder’s postseason games as they reached Game 7 of the Western Conference finals. Oklahoma City had won the championship the previous season.
The 22-year-old has played 227 regular-season games over his first three years. His development has coincided with the Thunder’s rise from a promising young group into a championship team.
The agreement follows offseason departures. CBS Sports reported that Oklahoma City traded Dort, Isaiah Joe and Aaron Wiggins while reducing payroll to move below the second apron.
CBS characterized Wallace’s anticipated starting role as one reason retaining him mattered. Its analysis also highlighted the difficulty of balancing the Thunder’s established core with future payroll commitments.
NBA.com noted that Oklahoma City’s projected starting five are now under contract for several years, providing continuity even as other parts of the roster have changed.
Wallace entered the league from Kentucky as the No. 10 pick in 2023. Dallas drafted him before trading him to Oklahoma City in the Dereck Lively II deal.
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