Miami Dolphins
In February 2008, Ross bought 50% of the Miami Dolphins franchise, Dolphin Stadium (now known as Hard Rock Stadium), and surrounding land from then-owner Wayne Huizenga for $550 million, with an agreement to later become the Dolphins' managing general partner. On January 20, 2009, Ross closed on the purchase of an additional 45% of the team from Huizenga. The total value of the deal was $1.1 billion. This means Ross is now the owner of 95% of both the franchise and the stadium. Ross announced his intention to keep Bill Parcells as the director of football operations.
Since buying the Dolphins, Ross has brought in Gloria Estefan, Marc Anthony, Venus Williams, and Serena Williams as minority owners of the team. In 2013, Roger Goodell made a pitch to the Florida legislature on Ross’ behalf in order to obtain multimillion-dollar public funding from the state to help renovate Hard Rock Stadium, the Dolphins' home field. The Dolphins wanted $3 million a year for the next 30 years, with Ross committed to funding 70% of the cost. However, Florida lawmakers rejected the proposal, despite granting over $100 million in subsidies to The Ballpark of the Palm Beaches. Ross ended up spending $500 million out-of-pocket to refresh the stadium.
On March 27, 2017, Ross cast the only "no" vote in the NFL owners' 31–1 "yes" decision on the Oakland Raiders request for approval to move to Las Vegas starting in the 2020 season.
Since 2019, the Miami Open has been hosted at the Hard Rock Stadium.
On February 1, 2022, Ross and the Dolphins, among other teams, were cited in a federal class-action lawsuit brought forth by his former head coach Brian Flores, alleging that Ross offered Flores a $100,000 bonus for every game he lost in the Dolphins’ 2019 campaign. As of February 2, 2022, the NFL publicly denied all allegations against Ross and all others listed in the lawsuit, releasing in an official statement: "We will defend against these claims, which are without merit."
On August 2, 2022, following a six-month independent investigation by Mary Jo White and a team of lawyers, it was announced that the NFL would strip the Dolphins of their 2023 first-round draft pick and a 2024 third-round draft pick for violating the league's anti-tampering policy on three occasions from 2019 to 2022 by engaging in impermissible conversations with quarterback Tom Brady and then-New Orleans Saints coach Sean Payton, both of whom were under contract with other teams. Ross, the team owner, was also fined $1.5 million and suspended through October 17, 2022, and was prohibited from being at the Dolphins' facility or representing the team at any event until then. He was also prohibited from attending any league meeting before the annual meeting in 2023, and was removed from all league committees indefinitely. Vice chairman and limited partner Bruce Beal was fined $500,000 and was not permitted to attend any league meetings for the rest of the 2022 season. The investigation did not find that the Dolphins intentionally lost games during the 2019 season.
In December 2024, Ross struck a deal to sell a 10% stake in the Dolphins to private equity giant Ares Management, at an $8.1 billion valuation. Ross also sold a 3% stake in the team to Alibaba co-founder Joe Tsai. The stake sales were among the first under new NFL rules that allowed PE firms to buy minority stakes in teams, a practice seen in the NBA and other pro sports leagues.
In March 2026, Ross sold 1% of his stake in the holding company behind the Dolphins for $125 million, valuing the company at $12.5 billion, a record valuation for a minority transaction in sports. Ross sold the 1% stake to Lin Bin, the co-founder of Xiaomi.