Celtics win record 18th NBA championship with Game 5 rout of Mavericks

BOSTON — Jayson Tatum put his hands behind his head, with TD Garden fans standing on their feet cheering around him, and took it all in. Walking to the bench, he wrapped both arms around Celtics coach Joe Mazzulla. The journey was complete. The Boston Celtics again stand alone among NBA champions. Celtics forward Jayson...