Suddenly the criticism that the Boston Celtics  needed double-overtime to put away the Charlotte Bobcats  doesn’t seem so bad. With Gilbert Arenas  back on the court, the Washington Wizards  beat the Cleveland Cavaliers , 109-101, on Thursday night. They snapped the Cavs winning streak at 13 games. The Celtics may have had trouble with the 34-win Bobcats, but this was only the Wizards’ 18th victory of the season. Do the Wizards have the potential to play the role of spoiler again? The Celtics will find out when they come to Boston for the last game of the regular season on April 15.