THE BEST COACHING JOB IN THE NBA THIS SEASON

NBA 2025-26: Coach of the Year - Mazzulla, Bickerstaff, Johnson — three cases, one award. Why Boston's gap year that wasn't settles the argument.

THE BEST COACHING JOB IN THE NBA THIS SEASON

Every year, this award goes to the coach who did the most with what he had. This season, three men made that question genuinely difficult to answer — and four more made sure the conversation stayed crowded.


#1 — JOE MAZZULLA, BOSTON CELTICS
Record: 56-26 · 2nd seed, Eastern Conference

The offseason looked brutal on paper. Jayson Tatum tore his Achilles. Kristaps Porzingis, Jrue Holiday, Al Horford and Luke Kornet were all gone. Boston's preseason win total sat at 41.5 — a line designed to account for a gap year. The Celtics finished 14.5 wins above it.

What he did:

First, Mazzulla proved his system doesn't require stars — it requires believers. Neemias Queta, Baylor Scheierman, Hugo González and Jordan Walsh all stepped into expanded roles and didn't flinch. The Celtics finished as a top-four offense and defense in the league despite having, on most nights, a roster that would struggle to win a coin flip in terms of individual talent against half the conference.

Second, Mazzulla completed his transformation into the prototype of the modern NBA head coach. Analytically obsessed, three-point focused, tactically flexible — he runs one of the most disciplined offensive systems in the league and holds that structure together when the pieces around it keep changing. Boston went 8-1 in games without Jaylen Brown. That is not roster depth. That is coaching.

Third, and perhaps most importantly: Mazzulla arrived. For two seasons, the question around Boston was whether the Celtics were winning despite him or because of him. After this season — without Tatum, without the veterans, without the margin for error — that question is answered. He is one of the best coaches in the NBA. Not a beneficiary of talent. A creator of it.


#2 — J.B. BICKERSTAFF, DETROIT PISTONS
Record: 60-22 · 1st seed, Eastern Conference Previous season: 44-38

The numbers tell the story cleanly: 14 wins two years ago. 44 wins last year. 60 wins this year. Detroit has gone from the laughing stock of the league to the top of the Eastern Conference in just Bickerstaff's second season on the job. No other coach in this race can point to a three-year arc like that.

What he did:

First, Bickerstaff built an identity before he built a record. Detroit plays hard, plays connected, plays with an edge. The Pistons have managed to be a top-five team in clutch play even without elite shooting, and Bickerstaff deserves credit for how he balanced offense and defense while making use of Ron Holland and Ausar Thompson off-ball. It's a team that looks like its coach — relentless, physical, accountable.

Second, he kept the machine running when Cade Cunningham went down. The Pistons held the number-one seed in the East during Cunningham's 12-game absence due to a collapsed lung. Most teams collapse around their star's injury. Detroit barely blinked. That speaks to roster depth, yes — but more to a culture Bickerstaff has spent two years installing.

Third, Jalen Duren. The 22-year-old center became an All-Star and set the record as the youngest player in NBA history to average a double-double over a full season. Duren was a project two years ago. He is now a franchise cornerstone. That development didn't happen by accident.


#3 — MITCH JOHNSON, SAN ANTONIO SPURS
Record: 62-20 · 2nd seed, Western Conference. First full season as head coach

The easiest narrative around Johnson's season is that he has Victor Wembanyama and the rest is straightforward. The trouble with Johnson's candidacy is that voters will give the majority of credit to Wembanyama and the talent on the Spurs roster. That narrative is unfair — and Johnson's résumé this season makes the case against it.

What he did:

First, Johnson replaced Gregg Popovich. Not as a placeholder — as a head coach, in his own right, in his first full year leading a team. The shadow of Pop over everything in San Antonio is real. Johnson stepped out of it immediately, establishing his own voice, his own schemes and his own identity for a roster that could easily have deferred to the legend rather than the new guy.

Second, the Spurs went 4-1 against the Oklahoma City Thunder — the defending champions with the best record in the NBA. They finished 30-4 since February 1. Johnson has helped bring along young players like Stephon Castle and Dylan Harper, built confidence in the supporting cast, and created a team that looks far more organized and dangerous than many expected. When Wembanyama was out, the Spurs went 10-5. That's a coached team, not a one-man show.

Third, Johnson calibrated the impossible: managing the development of the most scrutinized young player in basketball while pushing for the best record in the league. Wembanyama is 22. He needs space to grow, room to fail, and moments to learn. Johnson gave him all of that — and won 62 games doing it.


HONORABLE MENTIONS

Charles Lee, Charlotte Hornets
45-37 , 9th seed, Eastern Conference, Play-In

Before January, the Hornets were 16-28 and trending toward another lost season. From that point on, they went 29-9 — posting the NBA's best offensive rating over that stretch and making the Play-In Tournament for the first time in a decade.

Lee coaches chaos and calls it a system. The Hornets are young, offensively unpredictable, and completely dependent on improvisation at times — and Lee surfs that wave better than any coach in this field could. On any given night, Charlotte's rotation looks like it was drawn up on a napkin. By the fourth quarter, it looks like a masterplan. That gap between apparent disorder and genuine effectiveness is where Lee lives.

He is riding the razor's edge every game: let the talent breathe and it flies; over-structure it and it dies. His instinct for which side of that line to stay on has been the difference between a lost season and a legitimate playoff story. The Hornets went from a 27.5-win preseason projection to 45 wins and a Play-In berth. More than the number, though, is what Lee built: a team that genuinely believes it can beat anyone on any night — because it has. Charlotte knocked off the Thunder, the Spurs and the Celtics during their second-half run. None of those wins were accidents.

Charlotte is not yet a finished product. Lee would be the first to say so. But the trajectory he has set in his second year on the job — the identity, the culture, the confidence — points to a coach who will be in this conversation for years to come. The award won't come this season. The argument is already being built for next.

Mark Daigneault, Oklahoma City Thunder
64-18, 1st seed, Western Conference

Jalen Williams played only 31 games. The Thunder still finished with the best record in the NBA for the third straight season. Daigneault runs the most disciplined defensive system in the league, develops young players at a rate no other organization matches, and somehow keeps a young, hungry roster from getting complacent after back-to-back championship seasons.

The most underrated aspect of his job this season was expectation management. Oklahoma City entered 2025-26 as defending champions with a target on their back and a significant injury to their second-best player. In that environment — where complacency is the real opponent — Daigneault kept the Thunder focused, hungry and connected from opening night to the final buzzer of the regular season. He doesn't get enough credit because winning is expected in Oklahoma City now. That expectation is itself his greatest achievement.

David Adelman, Denver Nuggets
54-28, 3rd seed, Western Conference

Jokić missed significant time with a knee injury. Murray played through his own issues. Adelman kept Denver in legitimate playoff contention and secured the third seed in a crowded Western Conference — a conference that included the defending champion Thunder, a surging Spurs team and a Lakers squad built around the league's scoring champion.

He is the quietest excellent coach in the league. No headlines, no drama, no viral moments. Just a team that keeps winning when everyone expects it to fall apart. Adelman's greatest skill is invisible to the eye: he manages Jokić's emotional investment in the game better than almost any coach could, keeps the Nuggets playing connected basketball even through roster disruption, and finds ways to win that don't rely on scheme complexity. Denver's offense is Jokić. Denver's defense is everyone else buying in. Making that work, night after night, over 82 games, is harder than it looks.

Jordan Ott, Phoenix Suns
45-37, 8th seed, Western Conference, Play-In

The first-year coach inherited a Suns roster in transition and built a defensive identity where none had existed. Phoenix was a genuine surprise throughout the first half of the season before injuries depleted the roster — a development that would have ended most first-year coaching tenures before they started.

Ott didn't survive the adversity. He adapted to it. The Suns changed their shot diet, changed their defensive scheme and changed their culture under a 36-year-old head coach in his first NBA season at the helm. That Phoenix finished 45-37 and made the Play-In is not a modest achievement — it is the kind of result that, under normal circumstances, would earn a coach serious hardware consideration. The circumstances were not normal this year. Three coaches above him in this conversation had equally compelling cases. But Ott's season deserves to be remembered when the next generation of NBA head coaches is discussed. He arrived ready.


The verdict: Mazzulla wins. Not because Bickerstaff's case is weak — it isn't — but because what Mazzulla did in Boston this season had no margin for error. Bickerstaff had Cade Cunningham. Johnson had Wembanyama. Mazzulla had Jaylen Brown, a collection of role players, and a system so well-built it ran without its engine.

That's coaching. That's the award.