The AP reports: Ray Allen scored 29 points, Kevin Garnett added 14 points and 11 rebounds and the Celtics shut down Ron Artest and Yao Ming to hand Houston its first loss of the season. Tracy McGrady scored 26 points, but couldn’t rally the Rockets down the stretch… Paul Pierce added 13 points and nine rebounds for the Celtics. Yao went 4-for-14 from the field and scored eight points for Houston. “Probably one of my worst games of all time,” Yao said… Aaron Brooks scored 12 for the Rockets, but starting point guard Rafer Alston had an off night, going 1-for-6 from the field and scoring four points.