Shams Charania: “Right now, Boston is fully focused on winning a championship. That is the number one focus: repeating. But I can tell you—the rest of the league is bracing for some level of change to come to the Celtics’ roster this offseason. Sources have been telling me for weeks now that the Celtics will be exploring trade options in the offseason. This team—this iteration—is just not going to be sustainable for this team. And no one around the organization, from players to staffers, would be surprised if there are changes coming to this roster.