Boston Basketball Partners LLC, the controlling ownership group of the Boston Celtics, announced plans to sell the team on Monday.

The sale was the result of the Gresbeck family, who control the group, “deciding to sell the team for estate and family planning purposes.” statementThe family plans to sell a majority stake in the team by the end of 2024 or early 2025, with the sale expected to be completed by 2028, according to the statement.

Statement from the Boston Celtics pic.twitter.com/DqArzkGnR5

— Boston Celtics (@celtics) July 1, 2024

This has got to be the strangest move of the NBA offseason, and it doesn't even involve any player or front office changes: The Celtics had just won a record-breaking 18th NBA championship and their first since 2008, but the ownership team quickly changed course and decided to sell the team.

Personally, I think a championship, especially the first one in a long time, would energize ownership. Owners would get excited about a win and would crave more, but that wasn't the case this time. Maybe the Grousbecks feel like they lost sight of their purpose in owning the Celtics after this win and no longer feel the need to shoulder the burden of owning a franchise.

Either way, this is a big change for the Celtics: The philosophy and tone of the organization is up to the owner, and if the new leader is incompetent or simply not as good as the Grousbeck brothers, it could wreak havoc on the Celtics for years to come. (RELATED: Mikal Bridges reunites with Villanova teammates in trade to Knicks, Nets acquire loads of draft picks: Report)

The “For Sale” sign was put up and it was time to see who was interested. $5.1 billion A check that will help define the future of Boston basketball.