Boston's offense was in middle of the pack in the regular season and again in the playoffs, and it always bogged down against good defenses. It's an amazing testament to their defense that they made it so close to a title.
Zach Lowe of CelticsHub:
All season, the Celtics struggled offensively when they could not get out in transition. We should not have been surprised that they did so again when faced with a Laker defense determined to get back on defense, shut off penetration and string Pierce and Allen out toward the sidelines on screen/rolls. Rajon Rondo was the beating heart of this team, but his inability to hit a 16-footer on screen/rolls is still the anchor that can sink an offense lacking a consistent post threat and susceptible to player fatigue.
People will remember Boston’s offense going cold in the 4th quarter of Game 7, and they should. The Celtics were flailing, relying on Pierce isolations and post-ups from Davis and KG on the left block as four tired players stood around on the right side of the floor.
But I’ll remember just as clearly the C’s inability to score even a single point over the first 4:47 of the 2nd quarter, blowing an opportunity to assert control of a game they led by nine when the quarter started.
And the turnovers. All damn season with the turnovers. The C’s coughed it up 15 times in Game 7, and that doesn’t sound like much, considering they averaged about 15.5 per game in the regular season. But Game 7 was an ultra-slow game, with about 83 possessions for each team. Those 15 turnovers work out to a turnover on about 18 percent of Boston’s possessions.
Perspective: The Charlotte Bobcats, the most turnover-prone team in the league, turned the ball over on 15 percent of their possessions this season.