The AP reports: Paul Pierce had 20 points and nine rebounds, Ray Allen scored 18 points and the defending NBA champions clamped down on Oklahoma City after the Thunder’s fast start to run away with a 96-83 victory Wednesday night… Kevin Garnett added 17 points and eight rebounds, and Perkins had 10 points and nine rebounds. Allen also had nine rebounds as four of Boston’s starting five had eight or more. Kevin Durant led the Thunder with 17 points, but had another poor shooting night in his team’s new gym. He went only 6-for-15 and is 18-for-50 this season at the Ford Center. Jeff Green added 14 points for Oklahoma City, and Russell Westbrook finished with 13 after two late 3-pointers.