Dan Gilbert purchased the Cleveland Cavaliers for $375 million ten years ago this month.
Gilbert's net worth at the time was estimated to be worth $800 million and is now north of $4.7 billion. Gilbert's holdings has expanded from mortgages and venture capital to casinos, real estate, consumer products, tech, minor league sports franchises and a Cavaliers' team worth more than $900 million.
Gilbert has withdraw publicly, but sources inside and outside of the organization say his involvement in the Cavaliers' day-to-day operations has increased.
"If you had a 1-to-10 scale of an owner's involvement Mark Cuban would be a 10," said one prominent league agent. "Dan would be a 9."
Gilbert continues to live in suburban Detroit, but regularly flies to Cleveland to attend home games. Gilbert is known to monitor the design of the Cavaliers' jerseys, what's on the scoreboard during timeouts and many other details of the franchise.
Gilbert has become more active in Cavaliers' trade talks, contract negotiations and the draft process.
It is not unusual for Gilbert to speak directly to an agent or to up the ante in trade talks by calling an opposing owner, sources said.
Gilbert disagrees with the idea that he's heavily involved in basketball decisions.
"I don't think that's accurate," Gilbert said. "The way I look at it is it's the owner's job to say yes before you say no. I believe an owner is there to set the philosophy and to establish the culture but you let your guy pull the triggers."
The Cavs went from $23 million under the salary cap in July to $18 million over the cap and into the luxury tax in the same season, which is unprecedented in NBA history.
"Every owner is more involved than they show publicly," said one league official who knows Gilbert well. "But Dan has worked hard to get the organization to where he wants it."