By Gary Dzen, Boston.com Staff PHILADELPHIA -- The news that the Celtics may lose guard Avery Bradley for the rest of the season is an immediate blow to the team's defense, depriving Doc Rivers of his best on-ball defender in the seventh game of a series dominated by guard play. Down the road, the potential loss of Bradley could severely limit Boston's chances against stars like Miami's Dwyane Wade. But defense wasn't Boston's problem in Game 6, the second straight game in which Bradley was a spectator with a left shoulder injury. The Celtics' failure to muster more than 75 points, and their second-worst playoff shooting performance in the New Big Three era (33.3 percent), was the main issue. Rarely have the Celtics looked this ... Continue reading →