What Happened to Boston Celtics (NBA)?
The Boston Celtics have experienced a period of significant highs and lows since 2023. After winning their record 18th NBA Championship in 2024, they faced a setback in the 2025 playoffs, being eliminated in the Conference Semifinals following a devastating Achilles injury to star Jayson Tatum. As of March 2026, the team, under coach Joe Mazzulla and new majority ownership, remains a top contender in the Eastern Conference, with Jaylen Brown stepping up in Tatum's absence and a focus on a faster pace of play.
Quick Answer
The Boston Celtics won their 18th NBA Championship in 2024, defeating the Dallas Mavericks. Their 2024-25 season saw them clinch the second seed in the Eastern Conference but ended in the Conference Semifinals after Jayson Tatum suffered an Achilles injury. In August 2025, a new investor group led by Bill Chisholm acquired majority control of the franchise. As of March 18, 2026, the Celtics are 2nd in the Eastern Conference with a 45-23 record, with Jaylen Brown performing at an All-NBA level and Tatum recently returning from injury.
📊Key Facts
📅Complete Timeline11 events
Joe Mazzulla Named Interim Head Coach
Joe Mazzulla was named interim head coach of the Boston Celtics after Ime Udoka was suspended for the entire 2022-23 season.
Joe Mazzulla Promoted to Full-Time Head Coach
After leading the team to a league-best 42-17 record, Mazzulla was officially named the full-time head coach.
Boston Celtics Win 18th NBA Championship
The Celtics defeated the Dallas Mavericks in five games to win their record 18th NBA Championship.
Celtics Clinch 11th Consecutive Playoff Berth
The Celtics secured their 11th straight playoff appearance with a 115-113 win over the Brooklyn Nets.
Jayson Tatum Suffers Achilles Injury; Celtics Eliminated from Playoffs
Star player Jayson Tatum tore his Achilles in Game 4 of the Eastern Conference Semifinals, leading to the Celtics' elimination by the New York Knicks in six games.
Joe Mazzulla Signs Multi-Year Contract Extension
Head Coach Joe Mazzulla agreed to a multi-year contract extension with the Celtics after leading them to a championship and averaging over 60 wins per season.
Bill Chisholm's Group Acquires Majority Ownership
An investor group led by Bill Chisholm completed the acquisition of a majority control position in the Boston Celtics, valuing the franchise at $6.1 billion. Wyc Grousbeck remained as co-owner and CEO.
Celtics Adopt Faster Pace of Play for 2025-26 Season
With Jayson Tatum sidelined, Coach Joe Mazzulla implemented a philosophical change, aiming for the Celtics to play with a significantly faster tempo.
Celtics Make Key Trades at Deadline
The Celtics traded Anfernee Simons for Nikola Vucevic, and also moved Xavier Tillman Sr. and Josh Minott, aiming to get under the luxury tax and gain roster flexibility.
Jayson Tatum Returns from Achilles Injury
Jayson Tatum made his return to the Celtics lineup after recovering from his Achilles injury, with discussions around his fit alongside a surging Jaylen Brown.
Current Season Standing: 2nd in Eastern Conference
As of today, the Boston Celtics hold a 45-23 record, placing them second in the Eastern Conference standings, trailing only the Detroit Pistons.
🔍Deep Dive Analysis
The Boston Celtics entered a new era of success under head coach Joe Mazzulla, who was named interim head coach in September 2022 and then full-time in February 2023. His offensive philosophy, emphasizing three-point shooting, helped the team achieve a league-best 57 wins in the 2022-23 season and a second-place offensive rating. This culminated in a dominant 2023-24 season where the Celtics secured their record 18th NBA Championship, showcasing exceptional offensive and defensive balance and an all-time high point differential.
Building on their championship success, the 2024-25 season saw the Celtics continue their strong performance, finishing with a 61-21 record, placing them second in the Eastern Conference. They clinched their 11th consecutive playoff berth on March 15, 2025. However, their playoff run was cut short in the Conference Semifinals when star player Jayson Tatum suffered a devastating Achilles injury, leading to an upset loss to the New York Knicks in six games. This marked the first time the Celtics were eliminated before the Conference Finals since 2021.
Off the court, a significant change occurred in August 2025 when an investor group led by Massachusetts native Bill Chisholm acquired majority control of the Boston Celtics for a record $6.1 billion, with full control expected by 2028. Wyc Grousbeck remained as a co-owner and CEO. Following the 2024-25 season, Coach Joe Mazzulla signed a multi-year contract extension in August 2025, entering his fourth year as head coach. The 2025-26 season began with a philosophical shift under Mazzulla, aiming for a faster pace of play, a contrast to their previous methodical approach, especially with Jayson Tatum sidelined due to his Achilles injury.
As of March 18, 2026, the Celtics are a dominant force in the Eastern Conference, holding a formidable 45-23 record, placing them second in the East, trailing only the Detroit Pistons. Jaylen Brown has stepped up significantly, playing at an All-NBA level and averaging over 28 points per game. Jayson Tatum recently returned from his Achilles injury in March 2026, and while still regaining form, his presence is a key factor. The team also made several trades at the February 2026 deadline, acquiring Nikola Vucevic and making moves to get under the luxury tax. The Celtics' defense remains a calling card, leading the league in fewest points allowed, while their offensive efficiency ranks second. They are actively scouting for the 2026 NBA Draft to maintain their competitive window.
What If...?
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