Mazzulla steers Boston through a retooling season, balancing championship pedigree with roster turnover ahead of the 2026 deadline; coaching adaptability and communication will shape lineup stability and fantasy opportunities.

Mazzulla’s rotation decisions will determine Scheierman’s path to a stable role. His willingness to rely on a developing playmaker in crunch time and multi-positional lineups will shape the Celtics’ ceiling this season, as well as Scheierman’s fantasy upside.

Mazzulla’s extension signals belief in his leadership, development-forward approach, and ability to translate Celtics’ ethos into a consistent contender trajectory with Tatum and Brown at the core.

Mazzulla's extension reflects his successful leadership of the Celtics, who have seen significant playoff success and a championship. As the team transitions, his development of young players will be pivotal in maintaining competitiveness.

Joe Mazzulla has been extended as the head coach of the Boston Celtics, showcasing his leadership as they aim for future championships. At 37, he has already won an NBA title and has a solid record of over 60 wins in recent seasons.