​In 2023, Mark Cuban finalized the sale of his majority stake in the Dallas Mavericks to Miriam Adelson, with Daniel Dumont (Miriam Adelson’s husband) linked as a key figure in the deal’s business arrangements. Cuban has described a prior understanding—what he terms a handshake agreement—under which he would retain control over the Mavericks’ basketball decisions, while Dumont would oversee the team’s business operations. According to Cuban’s legal filings, this informal agreement was not merely verbal but had been reinforced through multiple emails and reiterated in conversations that occurred in the presence of Dumont, Miriam Adelson, another NBA owner, and several Mavericks employees. Cuban’s lawyers contend that these communications corroborate the existence of a binding understanding governing the distribution of decision-making authority within the franchise despite the sale.
Cuban’s account emphasizes a division of responsibilities intended to preserve his influence over basketball-related matters even after the sale. He asserts that the arrangement allowed him to continue guiding the team’s on-court strategy, player development, coaching decisions, and other basketball-centric decisions while ensuring that the new principal owner’s team—primarily through Dumont’s oversight of the business side—would handle financial operations, sponsorships, marketing, facilities management, and day-to-day commercial activities. In his legal action, Cuban portrays this arrangement as explicit and well-documented, presenting it as a safeguard that balanced the interests of the former owner with the new ownership’s control over the organization’s broader business functions.
The Athl et ic posed a direct question to Cuban about his ability to produce the emails that allegedly substantiate the handshake agreement. In response, Cuban stated, “Can’t say anything at all,” signaling a reluctance or strategic hesitation about disclosing those communications publicly or within the ongoing legal proceedings. The protective stance suggests that Cuban’s side views the emails as sensitive evidence that could influence negotiations, disputes, or the interpretation of the deal’s terms, potentially affecting the litigation or settlement discussions surrounding the franchise sale.
Meanwhile, coverage in major outlets highlighted the reported sale and the surrounding disputes, with the New York Times and The Athletic both paying close attention to the evolving narrative around what terms were agreed upon and how they were documented, if at all. The discussions touch on broader questions about what constitutes a binding agreement in the context of high-profile sports sales, particularly when informal understandings are asserted to govern critical decisions after ownership changes. The timelines involved indicate that Cuban’s claims focus on a pre-sale understanding that purportedly shaped the governance structure of the Mavericks post-sale, even as the formal sale process concluded and new ownership took the helm.
Analysts and observers have noted that such arrangements—where a seller seeks continued influence over basketball operations—are not entirely unprecedented in professional sports, though they are often scrutinized for potential conflicts of interest or for creating ambiguity about decision-making authority. The legal arguments in Cuban’s filing appear to hinge on the existence and enforceability of the handshake agreement, as well as on the evidentiary value of emails and oral statements made in the presence of key witnesses. If Cuban’s position is validated by the court or resolves through a settlement, it could set a significant precedent for how informal understandings are treated in sports franchise transactions.
Beyond the specifics of the Mavericks deal, the case underscores the ongoing tension between ownership structures, financial governance, and leadership control within major sports franchises. It raises pertinent questions about how and when an owner who cedes majority control can legally preserve influence over competitive strategy, while also ensuring that business operations run in line with the new ownership’s objectives and fiduciary duties. The unfolding situation invites close attention to the legal standards governing contracts and assurances formed during high-stakes acquisitions, including the degrees to which handshake agreements, emails, and oral confirmations are considered binding, enforceable, or subject to interpretation in court.
As the dispute continues, stakeholders across the NBA community—players, coaches, executives, fans, and investors—will be watching how the court interprets the evidence regarding the alleged handshake agreement and the supposed split of responsibilities between basketball operations and the business side. The outcome may influence how future franchise sales are negotiated and how likely it is that informal assurances will be relied upon in the governance of professional sports teams after ownership transitions. The Mavericks’ trajectory, both on the court and in the broader business landscape, remains intertwined with the legal questions surrounding this sale, underscoring the complexities that accompany prominent ownership changes in contemporary sports.