Isaiah Hartenstein isn’t going anywhere.

Hartenstein is returning to the Thunder on a three-year, $75 million deal, with a rare mutual option after the 2027-28 season, ESPN’s Shams Charania reported Friday night.

The contract also has a 15 percent trade kicker, per ESPN.

The Thunder had a big decision to make in settling their frontcourt, and they’ve locked down their man in the middle, which wasn’t always a guarantee heading into the season.

Hartenstein, who turned 28 in May, was initially signed following the 2023-24 season, in which he played for the Knicks, and immediately contributed to what became an NBA championship Oklahoma City team in 2025.

Hartenstein will continue to hold down the frontcourt with the talented but maligned Chet Holmgren.

It’s worth noting that, in the frontcourt, the Thunder are welcoming 7-foot-3 rookie Aday Mara, selected No. 12 overall in this week’s NBA draft out of Michigan, as well as 2025 No. 15 overall pick Thomas Sorber, who sat out all of last season with a torn ACL.

Jaylin Williams, who became key during the Thunder’s loss to the Spurs in the Western Conference finals, is also expected to play a meaningful role in OKC at the forward and center positions.

This, of course, is all pending any sizable transactions over the next few months.

Hartenstein averaged 11.2 points, 10.7 rebounds and 3.8 assists in 2024-25, which dropped to Hartenstein 9.2, 9.4 and 3.5 this past season, which was in part due to a drop in three minutes per game.

In the playoffs, however, his production jumped from 8.1 points, 7.5 rebounds and 2.2 assists per contest in 2024-25 to 9.1, 8.3 and 2.6 this past run.

The Thunder, who are still a second-apron team following this move, could look to make another cost-cutting measure.

The team has already traded multiple solid rotation pieces in Isaiah Joe, a knockdown 3-point shooter, and Aaron Wiggins, a regular season contributor whose minutes were muted in the playoffs, to the Pistons and Hawks, respectively, each for two second-round picks.

It’s possible that the team will maneuver either or both of Lu Dort and Kenrich Williams this offseason as well, in an effort to save money and scoot under the second apron.