In bold, green letters, two words jumped off the dry-erase board propped up along the baseline at Salve Regina University’s gymnasium, where the Boston Celtics began training to defend their NBA championship: “Anythings Possible!!!!”The apostrophe may have been missing, but the extra exclamation points harkened back to Kevin Garnett’s weeping howl toward the roof of the TD Banknorth Garden, after the Celtics proved that anything — or at least a worst-to-first run to an NBA championship — is possible with a lopsided victory over the Los Angeles Lakers in Game 6 of the NBA Finals.It really was possible for three ringless superstars to be thrown together one summer, sacrifice individual statistics for the greater good and win a championship in less than 10 months. It was possible for the Celtics to re-assume their position “on top of the world” following a 22-year, misery-filled hiatus. And as Garnett explained while later describing his emotions on the podium, it was possible for a kid to finally knock out the bully who had been picking on him.The Celtics don’t have to look any farther for motivation than their own practice gym in Waltham or in the Garden, where there are constant reminders of the championships won by the league’s most storied franchise. When Celtics Coach Doc Rivers wanted to motivate his three all-stars — Garnett, Paul Pierce and Ray Alen — before last season, he took them on the duck boat journey that Boston’s sports team take during championship parades. This season, Rivers gave Garnett, Pierce and Allen a simple message.“We are with the Boston Celtics,” Rivers said he told them. “If you want to be part of the conversation, you’ve got to win more than one. Some other franchises, you could probably live off this one for 20 years, but this is Boston and it is different.”Rivers said he sought the advice of “a load” of coaches and a former NBA championship player this summer about the challenges of repeating. “They all said the role players are the guys you got to get back to being role players,” Rivers said. “They’ve been on trophy tours all summer. They are having free dinners, making appearances for $10,000. Now you’re going to ask them to go set a pick or get that rebound?”No team has repeated as NBA champions since the Los Angeles Lakers won three in a row from 2000 to 2002, and no Eastern Conference team has won back-to-back to championships since the Chicago Bulls won three straight from 1996 to 98.Danny Ainge, the Celtics’ executive director of basketball operations, added youth and athleticism to the team, which will likely put more pressure on veterans Garnett, Pierce and Allen, who will be 32, 31 and 33, respectively, when the season begins.Repeating certainly is possible, Pierce said. “A lot of people said we needed a year together before we won the championship,” he said. “I feel like we’re ahead of the curve now. I think our chemistry is going to be a lot better. We know what we want to do from Day One. I feel like we’re ahead of the game now.”
