MIAMI — There was a change in the Celtics 12 man active roster but it didn’t involve Shaquille O’Neal.

Carlos Arroyo is in and Sasha Pavlovic is out for Game 1. Teams can change their 12-man active list before every game.

“He knows this team,” Doc Rivers said. “He was in their training camp. He was in their practice. He knows their personnel. I just thought he may be able to help us in some way.”

As for Shaq, Rivers said that he remains a possibility for Game 2, if not Game 3 back in Boston.

“He’s getting close,” Rivers said. “We actually had to make a decision so that’s better than what we had to do in the past. Maybe next game, if not I would say for sure Game 3.”