Billionaire Stephen Ross has announced that his son-in-law, Daniel Sillman, is set to become the future leader of the Miami Dolphins. In an interview with Bloomberg, Ross stated, “I’m fortunate.”
Ross, 85, who founded and chairs Related Companies, revealed he recently turned down a $15 billion offer for the team but did not identify the potential buyer. Reports from Puck in 2024 indicated that a proposed deal with fellow Palm Beach billionaire Ken Griffin collapsed late in negotiations; this agreement would have valued both the Dolphins and Hard Rock Stadium at $7.5 billion.
Ross acquired the Dolphins in 2009 for $1 billion. Since then, NFL team values have risen sharply due to limited supply—there are only 32 teams—and significant media contracts.
It remains unclear whether Sillman’s expected leadership will extend beyond the football franchise to include Hard Rock Stadium or other sports investments owned by Ross. The billionaire also holds exclusive rights to host Formula 1’s Miami Grand Prix through 2041.
Sillman has participated in interviews as the Dolphins search for a new general manager and head coach. He co-founded Relevent, a soccer media and events company supported by Ross’ RSE Ventures.
Ross has shifted his focus from New York City to West Palm Beach in recent years. Through his firm Related Ross, he is investing heavily in office properties with plans to develop West Palm Beach into a major business center. Last year, his buildings accounted for many of South Florida’s largest office leases. Recently, he secured a record $772 million construction loan for two office projects—the largest such financing package in South Florida history.
