The Celtics chasing Giannis Antetokounmpo before eventually trading Jaylen Brown to the Sixers has always felt like a messy story. Now Bill Simmons has offered up a theory about what actually killed the deal, and honestly it checks out.
According to Simmons, the Bucks had a handshake agreement with Giannis that they wouldn’t move him without his approval. The Celtics got far enough along in talks to discuss an extension with the two-time MVP, but that’s where everything stalled.
Here’s how Simmons broke it down. The Celtics offered two years at 30 percent of the cap. Giannis wanted three years at 35 percent. Boston wouldn’t budge off that second number, and once Giannis realized the sides couldn’t agree, he signed off on the Miami trade instead.
The Celtics never got past that contract standoff. Milwaukee sent Giannis to the Heat, and Boston pivoted hard. They moved Brown to Philadelphia for Paul George and some future draft compensation, which looks like a consolation prize compared to what could have been.
Simmons was speculating on his podcast, so take it with some salt. The Celtics haven’t confirmed any of this. But the timeline fits what we know. Boston dangled Brown publicly. Giannis got traded to Miami. Brown ended up in Philly.
What stings for Celtics fans is how close they apparently came. Not a bad trade offer that got rejected or a rival outbidding them. Just a disagreement over contract years and percentages. And now the Sixers look like real contenders in the East while Boston tries to figure out its new identity with George on the roster.
The whole thing is a reminder that superstar trades don’t happen in a vacuum. Giannis had leverage, he used it, and the Celtics couldn’t make the math work. Simple as that.

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