Mark Cuban alleges Mavericks governor freezes him out of business over proposed arena move.

Mark Cuban is accusing the current Dallas Mavericks ownership of engaging in "adversarial business practices" and freezing him out of a proposed arena relocation, AP News reported. The dispute centers on plans to move the team from its downtown Dallas home to the former site of a shopping mall.
Cuban sold his majority stake in the Mavericks in 2023 to the families of casino heiress Miriam Adelson and Patrick Dumont, Adelson's son-in-law who now serves as the team's governor. Cuban retained a minority share and, according to him, an agreement to keep running basketball operations — though Dumont ultimately handed Cuban full control of the team's basketball side.
Cuban says Dumont has deliberately blocked him from business opportunities tied to the proposed arena move, The Independent reported. The relocation would take the Mavericks away from downtown Dallas to a site where a mall once stood. Cuban argues this cuts him out of decisions and deals he expected to be part of as a remaining minority owner.
The phrase "adversarial business practices" comes directly from Cuban, according to News-Gazette. He has not detailed every specific grievance publicly, but the accusation signals a serious breakdown between Cuban and the new majority ownership group that took over the franchise less than two years ago.
Cuban sold the bulk of his ownership stake in 2023. The Adelson and Dumont families took majority control of the NBA franchise. Cuban stayed on as a minority owner. He also says he had a side agreement to keep overseeing the team's basketball operations — roster moves, coaching, and related decisions.
That arrangement shifted when Dumont gave Cuban full control of the basketball side, Gazette Extra reported. On the surface, that sounds like a win for Cuban. But it may have also been a way to define — and limit — exactly where Cuban's authority begins and ends, keeping him away from the business and real estate side of the arena move.
The proposed move is part of a broader plan by the Mavericks' new ownership to build a new arena outside the city center, The Daily Star reported. The target site is where a Dallas mall once stood. Such a project would involve major real estate and commercial development — exactly the kind of business opportunity Cuban says he is being shut out of.
Relocating an NBA arena is a massive undertaking. It involves city negotiations, construction contracts, naming rights deals, and surrounding development. For a minority owner to be left out of those talks would be a significant sidelining, especially for someone like Cuban who ran the franchise for over two decades.
The conflict puts a spotlight on how much real power Cuban actually holds under the new ownership structure. He controls basketball decisions, but that may be where his influence stops. The Independent noted that Cuban sold his majority stake — meaning the Adelson-Dumont group has final say on business matters, including the arena.
Cuban built the Mavericks into a championship franchise, winning the NBA title in 2011. His public accusation against Dumont suggests the two sides are far from aligned. Whether this dispute stays a war of words or escalates into a legal battle remains to be seen.
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