The Boston Celtics extended guard Derrick White on a monster four-year, $125.9-million deal, sources told ESPN’s Adrian Wojnarowski.

It’s the maximum extension available to White, Wojnarowski adds. The deal reportedly includes a player option.

The Celtics won the 2024 NBA championship in June, defeating the Dallas Mavericks in five games to capture a record 18th title.

White averaged 15.2 points, 5.2 assists, 4.2 rebounds, 1.2 blocks, and one steal per game in the 2023-24 regular season. The 29-year-old then averaged 16.7 points, 4.3 rebounds, and 4.1 assists in the playoffs.

The San Antonio Spurs traded White to the Celtics in February 2022. The Parker, Colorado, native made his first NBA Finals appearance later that year in a series defeat to the Golden State Warriors. Boston tabbed White as a starter at the beginning of the 2022-23 season.

White is a two-time member of the NBA’s All-Defensive team.