When Jayson Tatum ruptured his right Achilles tendon in the Celtics’ conference semifinals loss the the New York Knicks, everything about Boston’s immediate future changed.

But what won’t change is the Celtics’ front office’s prudence in making sure he has the space and time to make a full recovery.

Boston president of basketball operations Brad Stevens said the All-Star is progressing well following surgery last month. When asked if the Celtics had a timeline for Tatum’s return, Stevens was definitive that they will not rush the star’s rehab.

“We don’t and we won’t,” Stevens said Wednesday night following the first round of the NBA Draft. “We won’t put a projected timeline on him for a long, long time. … It’s baby steps right now. He’s actually progressed great, but I don’t know what that means in regard to projected timelines. But that will be in consultation with him … and everybody else to make sure when he hits the court, he is fully ready, and fully healthy. And that will be the priority.”

Tatum is expected to miss most if not all of next season. The injury already has had implications for next season, with the team opting to trade Kristaps Porzingis and Jrue Holiday — both key contributors from the 2024 title team — in an effort to get the team’s salary under the luxury tax second penalty apron.

Stevens said All-Star Jaylen Brown has already been back to the Celtics’ training facility since he had minimally invasive surgery to clean up his right knee. Brown is doing some light ball handling and work around the rim, Stevens said.

“We said be ready for training camp, and I think he’ll probably be going full well ahead of that,” Stevens said.

While Stevens said league rules wouldn’t allow him to address the pending trades of Porzingis or Holiday, he said anything the team does this offseason is with an eye toward regaining flexibility after multiple seasons with a high payroll.

“As far as whatever moves that those are a part of, they’re all separate and hard and things that you’re going to have to do your best to make sure you put yourself in the right positions,” Stevens said. “We knew this was coming. This isn’t a huge surprise. … The biggest thing for us is making sure that we balance that, maximizing what we can with regard to what we bring back so we can continue to build and grow.”

THE CELTICS SELECTED Hugo Gonzalez, a 19-year-old from Spain, with the 28th pick in the NBA Draft on Wednesday.

Gonzalez, a 6-foot-6 small forward, plays for Real Madrid in the Spanish professional league.

Boston also owns No. 2 pick in Thursday’s second round — No. 32 overall.