Celtics spoil Shaq’s debut with Cavs (AP)

Shaquille O'Neal has learned the ropes in his 17 NBA seasons. There's one lesson that has endured since he was a raw rookie. "You can't win a championship in the first game," he said. Boston's Big Three — plus Rasheed — spoiled Cleveland's overhyped season opener on Tuesday night with a 95-89 win over the new-look Cavaliers, who may have LeBron James and Shaq but…