Boston Celtics: Breaking News, Rumors & Highlights

Celtics’ Joe Mazzulla shows off in MMA offseason training

Joe Mazzulla’s relentless pursuit of improvement doesn’t stop when the NBA offseason begins. As the Boston Celtics gear up for the 2026-27 campaign, the reigning NBA Coach of the Year was recently spotted training at the renowned Xtreme Couture gym in Las Vegas.

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Mitchell Robinson is a perfect fit for Mazzulla Ball and the Celtics

The 2025-26 Boston Celtics were an elite regular season team last season because they dominated on the margins. Low turnovers and dominating the glass were the foundation.

Boston Celtics News / BoxingNews.com / July 15

Joe Mazzulla trains at Xtreme Couture, mines MMA for NBA edge

Boston Celtics head coach Joe Mazzulla has been seeking out MMA gyms across the country during the NBA season to train and study coaching techniques he can apply courtside.

Boston Celtics News / CelticsBlog / July 14

Can’t win them all: 5 Takeaways from Celtics’ Loss to Hawks

With Amari Williams and Hugo Gonzalez both out, Tucker DeVries and Chris Cenac Jr. got their first starts at Summer League. DeVries, who missed the opening games against the Toronto Raptors, looked every bit the sharpshooter he’s been made out to be, knocking down three of his eight attempts.

NBA News / Yardbarker Quizzes

The 'NBA Playoff-3's leaders' quiz

How many of the NBA players with the most three-pointers made in the postseason can you name in five minutes?

The 'Oldest 4 3-pointer playoff games' quiz

The 'No. 3-scorer by NBA franchise' quiz

The 'NBA Finals leading scorers' quiz

Chris Cenac News / NBA on ClutchPoints / July 14

Celtics may be developing the next great NBA shot blocker with rookie

It may be early days in Summer League, but it is looking like the Boston Celtics got themselves a major steal in Chris Cenac Jr., the big man out of Houston whom they drafted with the 27th overall pick of the 2026 NBA Draft.

NBA News / Yardbarker

The 25 biggest NBA clutch performers who weren't stars

At the end of the game or in other big moments, it's usually the team's stars who have the ball. Sometimes, though, it's the role players who get the chance to shine and deliver.

Boston Celtics News / Boston Celtics on SI / July 13

Boston Celtics Rookies Got a True NBA Test in Their First Summer League Loss

LAS VEGAS — Summer league is supposed to be the first taste of NBA life for newly drafted rookies. Guys are getting an early taste of the next level, figuring out the speed and physicality, the coaching, and the officiating, all while trying to work on the first tweaks to their games. But for Boston Celtics rookies Chris Cenac Jr.

NBA News / CelticsBlog / July 13

Celtics fall 102-90 to Hawks in first Summer League loss

The Boston Celtics lost 102-90 to the Atlanta Hawks in the team’s first loss of the Las Vegas Summer League, notably without 2025 draftees Hugo Gonzalez or Amari Williams.

Boston Celtics News / NBA on ClutchPoints / July 13

How Celtics’ Jayson Tatum is entering a career-defining era in 2026-27

For the first time, Boston Celtics’ Jayson Tatum will begin the upcoming season without All-Star Jaylen Brown, embarking on a new chapter that should define his career.

Boston Celtics News / Hoops Wire / July 13

Joe Mazzulla embracing Celtics’ new identity after Jaylen Brown trade

The Celtics know things will look different next season. After trading longtime star Jaylen Brown to the rival 76ers, Boston enters a new era built around Jayson Tatum, Paul George and a handful of veteran additions.

Derrick White News / Boston Celtics on SI / July 13

'He's a Natural': Derrick White Joins Celtics Coaching Staff for One Day in Vegas

LAS VEGAS — The Pavilion was awash in pink polos on Sunday afternoon. Maybe two dozen of them, each adorned with a salmon circle surrounding a white shamrock

Boston Celtics News / NBA on ClutchPoints / July 12

Celtics assistant had perfect response to Derrick White’s coaching gig

Derrick White may already be starting to lay the foundation for another career once his playing days are over. On Saturday, the Boston Celtics guard took on a unique role, as he took over assistant coaching duties for the club’s NBA Summer League team.

NBA News / Yardbarker

The 25 best NBA players to never play in college

Typically, the path to the NBA for most players is to spend at least a season in college to get high-level basketball and important development under their belts.

NBA News / NBA on ClutchPoints / July 12

Celtics deny Hornets’ bid to repeat as Summer League champions

The Boston Celtics made some noise in the NBA Summer League after dethroning the Charlotte Hornets in their latest matchup on Sunday night. Boston’s going through a different direction in its era with superstar forward Jayson Tatum.

NBA News / Boston Celtics on SI / July 12

Celtics Stock Up/Stock Down: Rookies Impress In Summer League Win Over Hornets

Las Vegas — The Boston Celtics ran away from the Charlotte Hornets in their second Las Vegas Summer League game, winning 87-75. They got off to another slow start, but their defense kicked in and held the Hornets under 20 points in each of the final three quarters.

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The 'MLB All-Star starting pitchers' quiz

The 'NBA blocks champions' quiz

The 'Women's Wimbledon champions' quiz

The 'Most three-pointers by NBA team' quiz

Boston Celtics News / CelticsBlog / July 12

The Celtics had a secret weapon in win over Hornets

LAS VEGAS — Derrick White walked into the Cox Pavilion in the same pink polo shirt that the Celtics coaching staff donned. Two nights earlier, he had sat courtside on the Celtics sidelines for the Summer League opener, chatting with teammates Jayson Tatum, Neemias Queta, and Jordan Walsh.

Boston Celtics News / CelticsBlog / July 12

Dillon Mitchell leads Summer Celtics to victory over Hornets, 87-75

The Boston Celtics returned to the court in game 2 of Las Vegas summer league to take on the Charlotte Hornets. The Summer C’s played a great game with plenty of good performances spearheaded by 2nd round rookie Dillon Mitchell who led the team with 24 points, 6 steals and 8 rebounds.

Boston Celtics News / NBA on ClutchPoints / July 12

Celtics’ Jordan Walsh gives crushed reaction to Jaylen Brown trade

The Boston Celtics trading away Jaylen Brown caused shockwaves throughout the NBA. Jordan Walsh was no exception as he said farewell to a fellow teammate.

Boston Celtics News / EssentiallySports / July 12

'Halle Berry Has Been Left': Analyst Gives Rude Awakening to Jaylen Brown for Complaints Over Celtics Exit

Jaylen Brown‘s time with the Boston Celtics came to an unceremonious end after a decade. Since then, the 5x All-Star has stated how disappointed and hurt he has felt.

Boston Celtics News / Boston Celtics on SI / July 11

Breaking Down the Celtics Summer League Win Over Toronto: Hugo Gonzalez, Chris Cenac Jr., Amari Williams

LAS VEGAS — The Boston Celtics kicked off their summer league with a very summer league game where they shot terribly early on, got blocked a ton, then came back once the shots started falling.

NBA News / Yardbarker / July 10

Could Donovan Mitchell suffer same fate as Jaylen Brown?

Could Cavaliers' Donovan Mitchell suffer same fate as Jaylen Brown?

The modern NBA equivalency is this: a supermax-contracted star traded for purely financial reasons. We’ve seen a series of players move on for ostensibly non-basketball reasons over the past few years, the latest being Boston Celtics star Jaylen Brown’s shocking trade to the Philadelphia 76ers.

Jaylen Brown following trade to 76ers: 'There's no loyalty' in NBA

'Grateful' Jayson Tatum finally addresses Jaylen Brown trade

Celtics might steal Lakers' preferred free-agency target

LeBron James' free-agency decision is holding up another All-Star signing

The '60-point NBA games' quiz