Rumor: Robert Williams not available in potential Kevin Durant trade

Photo by Jim Davis/The Boston Globe via Getty ImagesAfter yesterday’s report from The Boston Globe’s Adam Himmelsbach revealed some of the Celtics parameters for a possible deal for the Nets’ Kevin Durant that included not trading for Jayson Tatum and Jaylen Brown and balking at a package of Brown, Marcus Smart, and picks, NBC Sports’ Kurt Helin has another dealbreaker:

There’s good reason for pessimism (on a potential KD trade). Durant’s ultimatum to Nets owner Joe Tsai did not light a fire under trade talks. If anything, it made it far less likely a deal gets done in the short term. — why would Boston improve its offer now? It robbed the Nets of leverage. For example, Brooklyn was trying…