CLEVELAND — It had to happen eventually. The Boston Celtics are the best team in the NBA, but they’re not perfect. They’re imposing on paper and usually even more impressive on the floor. But their consistent, dynamic system is all about thinking fast and playing slow. They try to identify the opponent’s weakness as fast as possible and then start digging at it. But what happens when the opponent can’t stop missing? You get what happened Tuesday, the Cleveland Cavaliers’ biggest fourth-quarter comeback in franchise history. “Any given night, you can lose,” Jaylen Brown said after the Cavs’ 105-104 win, snapping the Celtics’ 11-game winning streak. “Tonight, obviously in this fashion, (Dean) Wade scores 20 in the fourth, and da-da-da-la-la,…
