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Michael Dwyer/Associated Press

In order for Al Horford to enter free agency, he has to opt out of the $30.1 million he's owed by the Boston Celtics for 2019-20. That's obviously a lot of money to turn down, but a world exists in which you can imagine Horford going down that route.

He's set to enter his age-33 season, and a deal in the neighborhood of $60 million over four years might be enticing if he feels he's more likely to get that security this summer than next.

His current squad might be the team to make such a deal.

"That will be discussed," Boston general manager Danny Ainge said when asked about the possibility of Horford opting out and extending with the Celtics, per NBC Sports Boston's Chris Forsberg. "That's one of the priorities on our list, as well."

That priority could head down the list if rumors about Clint Capela are true.

"The Celtics from what I have heard engaged pretty seriously on Clint [Capela]," Basketball Insiders' Steve Kyler tweeted. "... Everything is very fluid at this stage in the draft/trade process. It's finding out what you can do."

If Boston is already looking at other centers, perhaps Horford could land elsewhere for 2019-20. In that case, the young core of the Sacramento Kings would make for a fun pairing.

The "let's sign some vets to impart wisdom on the young guys" move didn't work for the Kings when they added George Hill and Zach Randolph in 2017. But it's not a strategy without some value. Sacramento just went to it too soon.

This team is more ready now. De'Aaron Fox, Buddy Hield and Bogdan Bogdanovic helped lead the Kings to a ninth-place finish in the Western Conference. Marvin Bagley III showed plenty of potential along the way. Now, Horford could fill a role one of his former teammates did for the Denver Nuggets.

Paul Millsap's maturity, leadership and versatility have been a crucial part of the young Nuggets' rise over the last two seasons. Could Horford provide the same for the Kings?