After hitting a wide-open 17-foot jumper, Zaza Pachulia stopped, turned downcourt, shook his hips and — horribly off rhythm — slapped his butt twice. By the time David West netted a fade-away jumper at the buzzer, bringing the third quarter to a merciless end, green-clad fans let out an audible groan and started filing toward the exits. In a game Boston had hoped would bring a measure of redemption, the city instead endured a painful reminder of what it missed out on when Kevin Durant signed with the Warriors. The four-time NBA scoring champion needed only 13 shots to finish with 23 points to go with 10 rebounds, seven assists and three steals. With Thompson (game-high 28 points) leading the way, Golden State blitzed the Celtics 31-9 in the third quarter to turn a seven-point halftime lead into a rout. The Celtics shot 2-of-17 in the third for the lowest scoring quarter by a Golden State opponent this season. "They're really good, and we all know that," said Celtics head coach Brad Stevens, who was without starters Jae Crowder (sprained left ankle) and Al Horford (concussion). During a three-hour meeting July 2 in the Hamptons, a Boston contingent that included...