Celtics enter new era after roster shakeup as Tatum out most of year

Jaylen Brown said Saturday that the Boston Celtics are entering a “new era” after a summer that upended the roster and left the team preparing for a season without Jayson Tatum for most, if not all, of 2025-26. Brown made the comments during a livestream as Boston reshaped its core, trading Kristaps Porzingis to Atlanta and Jrue Holiday to Portland, allowing Luke Kornet to sign elsewhere and leaving Al Horford unsigned and reportedly linked to Golden State.

Front-office decisions were driven in part by the league’s new second apron rules and the need to reduce payroll, officials and league observers said, and Tatum’s ruptured Achilles in May accelerated a shift toward cost-controlled moves. The result is a team built more around youth and rotation competition, with Brown and Derrick White the lone returning starters from last season’s lineup when the regular season begins October 22.

Brown, who underwent arthroscopic debridement on his right knee this summer to address a partially torn meniscus he played through, said his rehab has gone well and that he expects to be ready for the start of camp. “It feels like a new era,” he said. “Half the team is gone. I wish them the best. I...