Appearing on The Dan Patrick Show on Friday (h/t RealGM.com), Stein said the Sixers are one of a handful of teams chasing Leonard—whose preferred destination is the Los Angeles Lakers—now that his relationship with the Spurs is fractured.
"I was told yesterday in pretty strong terms they're ready to move on," Stein said. "They know this relationship cannot be repaired. This is beyond Pop and Kawhi meeting face to face and fixing it as Pop was able to do with LaMarcus Aldridge last summer. It is pretty much gone at this point."
On Thursday, ESPN.com's Adrian Wojnarowski reported the Spurs were "fully engaged" in trade talks, with the Lakers and Boston Celtics listed among potential suitors.
Stein added the Spurs are "ready to move on from Leonard provided that a palatable trade offer materializes this offseason."
Sports Illustrated's Jake Fischer also reported Thursday that the Sixers have "held serious internal discussions about acquiring Leonard over the last 48 hours."
"One team source says preliminary discussions with San Antonio revealed the Spurs have strong interest in a package involving burgeoning forwards Dario Saric and Robert Covington as well as a future first-round pick," Fischer wrote.
Barring an extension, Leonard will be an unrestricted free agent in the summer of 2019.