Kristaps Porzingis’s exit from the Boston Celtics creates a pressing question: who will fill his role on the team? Meanwhile, Joe Mazzulla looks ahead to a season he considers a pivotal chance to prove himself.
Celtics Notes: Kristaps Porzingis Talks Boston Replacing Him, Joe Mazzulla Prove-It Year, More

Key Takeaways:
- Porzingis’s move away from Boston leaves a notable vacancy.
- Boston must identify who will replace the former Celtics center.
- Joe Mazzulla considers this season a crucial test of his leadership.
- The story originally appeared in Si on 2025-09-04 12:59:00.
Introduction
Kristaps Porzingis, now a former center for the Boston Celtics, has publicly addressed the inevitable question hovering around the league: who will pick up where he left off? At the same time, for many in the Celtics organization, this period marks a season of self-reflection and renewed determination.
Porzingis’s Departure
Porzingis has spoken about the forthcoming puzzle facing the Celtics. Though he is no longer with the team, his role was significant enough that his departure calls for immediate consideration of which player, or combination of players, will replace him. Without Porzingis, the team faces fresh challenges that could define the season ahead.
Joe Mazzulla’s Prove-It Year
Head coach Joe Mazzulla views this next stretch of games as a prove-it year. The expectations are high, and while Porzingis’s exit may complicate the roster, Mazzulla sees the moment as a test of leadership and strategic innovation. The team’s performance will likely shape broader perceptions of Mazzulla’s coaching trajectory.
Looking Ahead
Despite missing a key figure in the roster, the Celtics hold ambitions of maintaining a competitive edge in the NBA. Much hinges on how the organization responds to Porzingis’s absence and on whether Mazzulla can propel Boston to meet its high standards. For fans and observers, all eyes remain on the Celtics’ next move—and how successfully the group adapts in a pivotal year.