Can Joe Mazzulla find the winning formula again for the Celtics? originally appeared on NBC Sports Boston
The Boston Celtics were nearing the finish line of this year’s 56-win regular season, a campaign that far exceeded what most outsiders thought possible given the jarring roster changes.
But as we peppered head coach Joe Mazzulla with questions about the progress of all the players who elevated to larger roles, he turned introspective.
“I think that winning is obviously something that you’re going after, but you’re really going after the process of growth and the process of being in a competitive arena and having competition expose who you are as a person and a player — the good and the bad,” Mazzulla said. “And I think that journey is more fulfilling than the wins.”
It’s a quote that stuck with us, especially after Mazzulla’s team came unglued and fumbled away a 3-1 series lead against the Philadelphia 76ers en route to an unceremonious first-round playoff exit, staining what otherwise was an overachieving season.
In the aftermath of Boston’s collapse, Mazzulla again pondered the duality of his job.
He suggested he felt as empty after Boston’s 2024 title season as he did in the years when the team fell short of its perpetual championship goals. Now, he hinted at a struggle to balance the obvious pain of a disappointing finish with all the high points in the journey before it.
On Tuesday, Mazzulla could become the first Celtics coach to win NBA Coach of the Year since Bill Fitch in 1980. Mazzulla would be only the fourth Celtics coach to win the award, joining Fitch, Tommy Heinsohn (1972-73) and Red Auerbach (1964-65).
Receiving the honor in the aftermath of Boston’s early exit won’t sit well with Mazzulla, who routinely bristled at talk of the award during the season. Mazzulla, who would prefer the organization as a whole be lauded for its regular-season success, is likely focused on what’s ahead and not what’s behind him.
Competition exposes who you are — the good and the bad. And despite his overwhelming successes — guiding the team to Banner 18 in 2024, and all those regular-season wins — the 2026-27 season will force Mazzulla to prove yet again that he can learn and grow from notable missteps.
The coach who so routinely pushed all the right buttons while leaning on every player on his roster at various points of the 2025-26 season must assess why, for the third time in four years, he wasn’t always able to find the right combinations on the big stage.
Mazzulla’s .726 regular-season winning percentage ranks third among all Celtics coaches, trailing only K.C. Jones (.751 over five seasons) and Fitch (.738 in four seasons). Fold in the playoffs and only Jones (.729 winning percentage over 512 games) has a better winning percentage overall than Mazzulla (.711 over 385 games).
The numbers make it impossible to suggest that Mazzulla hasn’t routinely put his team in position to be successful. The Celtics stiff-armed any suggestion of a gap year in large part because Mazzulla leaned heavily into bringing the best out of the younger players on Boston’s roster.
The one question heading into next season, with a harsher spotlight on Mazzulla despite all his successes, is whether he can be quicker to embrace change on the playoff stage.
It does not seem unfair to suggest that Mazzulla can sometimes be stubborn. He’s firm in his beliefs and surely isn’t afraid to voice them. While it’s also much easier in hindsight to second-guess some of his playing-time decisions in the aftermath of recent playoff exits, there does seem to be one theme in Boston’s recent playoff demises, and that’s a slow trigger on changes.
For much of the 2025-26 season, Mazzulla leaned into his team’s depth and thrived by finding the combinations that gave the team the best chance to win on a night-to-night basis. As the Sixers series slipped away, Mazzulla was perhaps a bit slow to try the curveballs that he routinely mixed in during the regular season.
He waited until Game 7 to fully experiment, trotting out a unique and unproven starting five, giving rookie Hugo Gonzalez his first real minutes of the series, and finally shifting fully away from midseason acquisition Nikola Vucevic while leaning on smaller lineups.
During the 2025 playoffs, Kristaps Porzingis was a shell of himself while battling a mystery illness that sapped his energy and left him inefficient on the floor, yet Mazzulla gave him every opportunity to fight through. In 2023, the Celtics dug themselves an 0-3 hole in the East Finals against Miami, eliminating all margin for error the rest of the way before falling short when Jayson Tatum limped through Game 7 after an early ankle sprain.
Mazzulla’s overall coaching acumen is not in judgment here. His Xs and Os are fantastic and Boston’s after-timeout success routinely showcases his white-board wizardry. Mazzulla has elite feel for his team over the course of an 82-game season.
The question is simply whether can he get better at the chess match when the playoffs arrive.
For those who want to rail against Mazzulla’s play style, we’ll kindly push back. The term “Mazzulla Ball” has become the blanket term for Boston’s 3-point heavy offensive style. But we’d suggest that Mazzulla’s bigger focus is on the margins as a whole, and Boston’s 3-point totals are more of a reflection of the roster delivered to him.
Yes, Mazzulla needs to be better at imploring his players to generate additional looks near the basket when perimeter shots are not falling. But we shake our head at the, “Too many 3s!” crowd when it’s clear that Boston’s roster is constructed to maximize that math game.
If the Celtics want to increase rim attempts, it’s also on president of basketball operations Brad Stevens to craft a roster with players who are able to create better off the dribble and get inside the paint with more frequency. The best shot for the Celtics might still be a kick-out 3 in most instances.
Crush Mazzulla if you want for Boston’s struggles against Philadelphia after Joel Embiid returned — and we absolutely would have preferred to see him get more creative with lineups earlier than Game 7 — but the Celtics simply did not have the personnel to combat Embiid once he shook his initial rust.
Neemias Queta couldn’t stay out of foul trouble, while Vucevic and Luka Garza had known defensive deficiencies. The Celtics lost a ton of talent up front last summer and, even as Queta thrived in his first season as a starter, the depth deficiency came to roost on the big stage.
Mazzulla isn’t the first coach to run into some other familiar troubles with this core. Like Stevens and Ime Udoka before him, the Celtics have routinely struggled with prosperity, fumbling away big leads and being unable to put away opponents when they’re on the ropes.
Regardless of the reason, the coach is always the easy target when things go awry. That’s just part of the job. It’s a lot easier for most organizations to shuffle in a new coaching voice than make changes to the core of their lineup. Every coach in the NBA knows they have a finite shelf life.
Mazzulla loves embracing a challenge. He’s the one who phoned Derrick White on his birthday last summer, noted how he loved that everyone thought the Celtics would suck, then hung up. Mazzulla used the gap-year suggestion as motivation to prove the doubters wrong.
The skeptics remain after the Celtics’ early playoff exit. Even Banner 18 doesn’t buy you much of a grace period in these parts. This is another chance for Mazzulla to embrace the journey, embrace some changes, and reaffirm why he’s a championship coach.