Falling out! Cuban accuses Mavericks' new owner of sidelining him: Depriving him of related business investment opportunities

On July 9, Beijing time, per local Dallas media, Mark Cuban charged that Mavericks' new owner Patrick Dumont, in the plan to move the team out of the city center and construct a new stadium, intentionally pushed him aside and denied him chances to invest in associated ventures. The Dallas Morning News revealed today that Cuban claimed Dumont undertook a series of "adversarial business maneuvers" to push the team's relocation to a former shopping mall site, 10 miles north of downtown.

A Mavericks official spokeswoman told the Associated Press that the team has no comment on the matter; Cuban himself has not yet responded to interview requests.

The billionaire sold a majority stake in the team to Miriam Adelson's family and Dumont in 2023, with Dumont being Adelson's son-in-law. Cuban had originally agreed to continue overseeing the team's basketball operations, but Dumont placed full authority over basketball matters in the hands of former general manager Nico Harrison.

The newspaper cited a written document submitted by Cuban stating that in February 2025, when the team planned to trade superstar Luka Dončić to the Lakers, he was kept completely in the dark. By the time he learned of it, the deal was already finalized and could not be stopped.

This blockbuster trade that shook the league ultimately led to disastrous consequences for the Mavericks; the team started the 2025-26 season with a dismal record, and Harrison was fired in November of that year.

Cuban still holds a 27% stake in the Mavericks. The report mentions that the original equity purchase agreement included a clause allowing the Adelson and Dumont families to acquire an additional 20% of Cuban's shares.

About a month before Cuban submitted this written material, the Mavericks signed a land purchase intent agreement, securing approximately 104 acres north of Dallas to build a new arena, with a planned completion date of 2031.

The Mavericks' current home, the American Airlines Center, has a lease that expires in 2031. The team, founded as an expansion franchise in 1980, has been based in downtown Dallas for over thirty years since its inception.

In the document, Cuban stated that according to the contract, his company was entitled to participate in the ancillary development projects around the new arena site, describing the area as a "rare and high-quality investment opportunity."