The Celtics have agreed to a four-year, $54 million contract extension with center Robert Williams, according to ESPN's Adrian Wojnarowski.
Williams, 23, is the second Boston player to sign a contract extension over the last week after guard Marcus Smart signed a four-year, $77 million contract extension on Aug. 16. Williams is now slated to be with the Celtics through at least the 2025-26 season.
Williams started 13 games in 52 appearances last year, averaging a career-high 8 points, 6.9 rebounds and 1.8 blocks per game. The Texas A&M product is an impressive leaper and improving rim protector, though he's battled injuries in each of his three professional seasons.