The Dallas Mavericks terminated general manager Nico Harrison on Tuesday, three days after he orchestrated the trade sending Luka Doncic to the Los Angeles Lakers. The dismissal closes a four-year run that delivered one Finals appearance and ends with the franchise stripped of its foundational asset.

Harrison, 44, arrived from Nike in 2021 with zero front-office experience and Mark Cuban's backing. He hired Jason Kidd, traded Kristaps Porzingis for cap space, and built the 2024 runner-up roster around Doncic and Kyrie Irving. The Doncic trade—finalized Sunday for what sources describe as three first-round picks, two pick swaps, and $47M in matching salary—was presented internally as necessary after the star requested out following consecutive playoff disappointments. Harrison was informed of his termination Monday evening by ownership group leadership, which now includes the Adelson and Dumont families after Cuban's $3.5B majority sale last year.

The timing signals new ownership's intent to install their own basketball leadership before the June draft. Harrison's departure removes the last Cuban lieutenant with decision authority. Assistant GM Michael Finley remains under contract but is not expected to run the search. The Mavericks enter the spring with $83M in committed salary for next season, Irving unsigned beyond 2026, and a coach whose future depends entirely on whoever answers the phone next.

Front-office operators are already circling. Danny Ainge, who left Utah last year, has longstanding Texas ties. Detroit's Troy Weaver is on an expiring deal. Philadelphia assistant Elton Brand played in Dallas and maintains relationships with Kidd's staff. The opening is considered a rebuild job—the inverse of Harrison's 2021 inheritance, when Doncic was 22 and the infrastructure was stable. Now the infrastructure is stable and the star is gone.

Watch for the hiring timeline, which ownership will compress. Rival executives expect a target list by week's end and first interviews within ten days. The new GM will control June's draft picks—Dallas owns its own first-rounder for the first time since 2020—and will inherit Irving's contract decision, which comes with a $50M player option. Kidd's status, officially undecided, will likely resolve within 72 hours of the new hire's first day.

Harrison's exit completes the dismantling of the Cuban front office. The infrastructure that built a championship in 2011 and sustained playoff relevance for fifteen years is now fully replaced. The Adelson-Dumont group has their reset.