A top reserve for the NBA champions, Hauser was already under contract for the upcoming season, but now is locked up through the 2028-29 season.

Soon after Boston won its 18th NBA title last month, Grousbeck announced that the storied franchise is going up for sale.

The Celtics star is expected to join the team by Monday after an excused absence for personal reasons.

Boston re-signs two important big men off the bench after already agreeing to bring back Jayson Tatum and Derrick White.

Tatum’s deal, which will kick in at the start of the 2025-26 season, will be worth $315 million over five years.

Wyc Grousbeck, whose family leads the ownership group, is expected to remain the team’s governor until the sale is finalized.

Boston is hoping to sign the forward to a contract extension this offseason.

Porzingis helped the Celtics secure their 18th NBA title while dealing with his injury.

Scheierman was drafted No. 30 overall out of Creighton and shouldn’t have to contribute immediately, but might be ready if called upon.