BOSTON — Brad Stevens spoke for the first time since the Celtics signed Jrue Holiday to a contract extension on Tuesday, holding an impromptu press conference five days from the NBA Playoffs. Ahead of a critical moment for the franchise, he praised the job Joe Mazzulla did this year, explained why Boston acted now to retain Holiday long-term and expressed optimism toward keeping his back court mate Derrick White in green.

“I can’t talk about much with things that we’re not allowed to discuss until July 1,” Stevens said. “But Derrick has had an amazing year. Derrick is a huge, huge part of our team and we want him around for as long as we can keep him around.

First, this group will have to affirm its ability to win, the Holiday extension in part an effort to extend the team’s window in the near future. A combination of repeater tax and second apron penalties will make it difficult to keep the Celtics together annually beginning in 2025-26, when Jayson Tatum will inevitably begin a super max extension with Boston. That raised questions about White’s future with the team. Stevens considered the Holiday move a bridge between Holiday’s two-way impact he provides and the mentorship he’ll continue to give the team’s younger players like Jordan Walsh.

“Jrue came here, joined our team and all he tried to do is add to win. For a guy who is as accomplished as he is, that is as used to more usage, more reps, more touches,” Stevens said. “All that came into play was what kind of a teammate am I being and can I help us win? … also the fact that he can play off the ball and be as effective as he’s been, I just think it shows another layer of what a guy can do … as you look at a person like him and you think about the long term of a group, you think, obviously, you need really good players and guys that can play on both ends of the court. You also want people that young players can look up to and he is a person they should look up to, and certainly do look up to.”

Stevens didn’t consider a 64-win season a given despite the talent Boston brought into camp. He placed credit for that, in part, on Mazzulla’s ability to instill a message to a team capable of playing on that level at both ends. The team’s desire to be part of something bigger than themselves, he said, also played into that and became obvious in the opening days of training camp. So the fourth-best year in franchise history didn’t surprise him, he only wanted to stress how difficult it is to get there.

The playoff run will be difficult too, he asserted, beginning round one whether Boston draws Philadelphia, Miami, Chicago or Atlanta following Wednesday and Friday’s play-in round. He expects the mix of playoff experience and some of the freshness younger players bring to their first postseason run as important too. Payton Pritchard projects to step into a significant playoff bench role for the first time in his career to finish his fourth NBA season