The fallout from Jaylen Brown’s final days in Boston keeps getting messier. Within 24 hours of being traded to the Philadelphia 76ers, the former Celtics star posted a heartfelt thank-you letter to the franchise and its fans. But the goodwill stopped there.
According to multiple reports, the friction between Brown and the Celtics front office was brewing long before the deal went down. And according to ClutchPoints’ Brett Siegel, that tension extended directly to Jayson Tatum.
“Early talks that we’ve had with league personnel and sources close to the situation say that there were frustrations from the front office with Jaylen Brown, specifically stemming from his Twitch sessions and his live streams of him specifically saying that this was the best year of his career, and this was the most fun that he had,” Siegel said. “This particularly rubbed Jayson Tatum’s camp the wrong way.”
That part matters. Brown calling the 2025-26 season — the one that ended in a first-round playoff exit against the 76ers — his favorite? It didn’t play well inside the organization. Tatum’s people were reportedly not happy about it. Neither was the front office.
Brown’s public comments after the series loss, where he criticized Boston’s offensive approach and shot selection, only added fuel. He called the team’s strategy predictable and seemed to question the coaching staff. The Celtics, who had already been navigating a tense relationship with their All-Star wing, decided they’d seen enough.
How the relationship soured
The breakdown wasn’t sudden. Siegel described a pattern of passive-aggressive communication from Brown that frustrated decision-makers. Instead of being direct about his concerns, Brown let things linger. The front office, meanwhile, had already explored bigger ideas — including a Giannis Antetokounmpo pursuit — before pivoting to a deal that sent Brown to Philly for Paul George, two future first-round picks, and two pick swaps.
“This passive aggressiveness that he tends to have in some of these conversations, and the way he comes off, instead of being straightforward with it,” Siegel added. “So that led the Celtics to decide that was the right time to part with Jaylen Brown.”
Brown says goodbye
For his part, Brown took the high road in his farewell note to Boston.
“I’m still processing how this all went down. I’m excited and disappointed at the same time,” Brown wrote. “I earned my respect from this city. I never asked for shortcuts or special treatment. I simply showed up every day, put my head down, and accepted every challenge.”
Brown spent 10 seasons in Boston, averaging 20.0 points on 47.7 percent shooting with 5.5 rebounds and 2.9 assists per game. He made five All-Star teams and won a championship. Now he’s headed to Philadelphia, where the Sixers will hope the version of Brown who showed up this season — the one who called it his favorite, even in defeat — is the one they’re getting.
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