The AP reports: Paul Pierce and Ray Allen found their shooting touch. LeBron James can only hope he left his in Cleveland. Pierce scored 19 points, Kevin Garnett added 13 with 12 rebounds, and Allen broke out of a seven-quarter scoring drought with 16 points to help the Boston Celtics beat the Cavaliers 89-73 on Thursday night and take a 2-0 lead in the Eastern Conference semifinals. One game after going 2-for-18 from the field and missing his last six shots, including a layup to tie the game with 8.5 seconds left, James missed his first three tries and finished with 21 points on 6-for-24 shooting… James will have a more welcoming crowd for the next two games than the Boston fans who serenaded him with a chant of “Over-rated!” as he went 1-for-11 over the second and third quarters. This time, the poor shooting was contagious: The Cavaliers shot 35.6 percent in the game, hitting just 11.8 percent in the second quarter as Boston turned an eight-point deficit into a nine-point lead. From early in the second quarter to early in the third, a span of 13:41, Boston outscored Cleveland 36-10. Zydrunas Ilgauskas had 19 points for the Cavaliers, and reserve Anderson Varejao had 10 rebounds in 32 minutes after forward Ben Wallace went to the locker room just 3:40 into the game due to dizziness.