The Boston Celtics got encouraging news on Jayson Tatum after their Game 6 loss to the Philadelphia 76ers.
Tatum sparked concern when he left the game and received treatment, but Celtics head coach Joe Mazzulla downplayed the situation afterward. According to Jay King of The Athletic, Mazzulla said Tatum “didn’t get hurt” during the game. Noa Dalzell of CelticsBlog also relayed that Mazzulla said Tatum “just got stretched” and “got some treatment,” adding that the Celtics coach did not seem concerned.
That matters because Boston’s season is now headed to a winner-take-all Game 7. The Celtics lost 106-93 in Philadelphia, failing to close out the Sixers and sending the series back to Boston with a trip to the Eastern Conference semifinals on the line. CelticsBlog noted that Tyrese Maxey scored 27 points, Paul George added 23 and Philadelphia forced Game 7 after Boston struggled offensively.
For the Celtics, any Tatum scare carries extra weight. This is not just a standard playoff injury update. Tatum returned this season from a ruptured Achilles, and Boston has had to manage his workload and recovery arc while trying to defend its place near the top of the Eastern Conference.
The first read, though, is positive: Mazzulla did not describe a new injury, and the postgame reporting pointed more toward maintenance than a fresh setback.
Jayson Tatum Injury: Why Is He Not Playing?
As of Mazzulla’s postgame comments, there was no indication that Tatum had been ruled out for Game 7 or diagnosed with a new injury.
That distinction is important. Tatum leaving a game or receiving treatment does not automatically mean he is unavailable for the next one. The Celtics will still have to release an official injury report before Game 7, and that report will provide the clearest formal status.
The NBA’s injury reporting rules require teams to list players whose participation may be affected by injury, illness, rest or another medical reason. For most games, teams must submit that information by 5 p.m. local time the day before the game.
So the answer to “why is Jayson Tatum not playing?” is that he has not been ruled out based on Mazzulla’s postgame update. He left during the game, received stretching and treatment, and the Celtics coach said he did not get hurt.
Jayson Tatum Injury History This Season
The concern around Tatum is amplified by what came before this playoff run.
Tatum suffered a ruptured Achilles during the 2025 postseason and underwent surgery in May 2025. He missed a significant portion of the 2025-26 season while recovering, and he was available for only 16 regular-season games because of the Achilles injury.
His return became one of the defining storylines of Boston’s season. Tatum made his season debut on March 6, 2026, against the Dallas Mavericks after missing the first 62 games.
Since then, the Celtics have had to balance urgency with caution. Tatum has appeared on injury listings this season for Achilles-related reasons, conditioning and injury management. Boston.com also reported that Tatum sat out an April 10 game against the New Orleans Pelicans because of injury management before the playoffs.
That history is why Thursday’s postgame update mattered so much. A player getting stretched after a playoff game can be routine. A player who recently returned from Achilles surgery getting stretched after leaving a playoff game is automatically going to set off alarms.
Mazzulla’s comments were the best-case immediate update for Boston. They did not guarantee Tatum will be full-go in Game 7, but they strongly suggested the Celtics were not dealing with a new injury crisis in the moments after Game 6.
Now the next step is the official injury report, and then Tatum’s actual movement, workload and rhythm when the Celtics return to TD Garden.
For Boston, the stakes are simple. The Celtics already let one closeout chance slip away. If Tatum is physically fine, they still have their top option available for the game that decides the series. If he is limited, the entire shape of Game 7 changes.
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