Who has allowed fewer points per possession this season, the San Antonio Spurs or Golden State Warriors?

Since I’m asking, you know the answer is Golden State.

The Warrior rank fourth in the NBA in defensive rating (99.3) – behind only the Pacers, Bulls and Thunder and just ahead of the Spurs. Last season, Golden State was a pedestrian 13th.

What’s the big difference?

Andre Iguodala has been a huge defensive upgrade on the wing. Draymond Green, one of the team’s top defenders, has gotten a bigger role in his second year. And Andrew Bogut is actually healthy.

Bogut has already played 47 games, more than the last two seasons combined. The Warriors defend better when he’s on the court (98.5 points allowed per 100 possessions) than when he’s off (100.4), though the disparity is even greater for Iguodala (95.2/103.7). Bogut is an excellent shot blocker and strong rebounder, and he also moves well enough to defend the pick-and-roll at superb levels.