BREAKDOWN—Are the Jazz improving defensively?

Have the Utah Jazz made defensive progress this season? One way I look at Utah’s defense is that I take the first 25 games of the season and then compare it to the last 20 games of the season. The Jazz were 6-19 after 25 games and by then Trey Burke had worked his way into the lineup comfortably.

Dean Oliver, in this brilliant book, broke the game down into four factors: defensive effective field goal % (which weighs 3-point shooting),  DFTA rate (the rate at which you send opponents to the free-throw line), DTO% (the percentage of possessions you force a turnover) and DREB% (percent of defensive rebounds you get).

Here is how the Jazz have changed over the course of the season:

FOUR FACTORS DEFG% DFTA% DTO% DREB%
First 25 games 24th 26th 24th 29th
Last 20 games 9th 16th 30th 13th

The Jazz have shown considerable growth in three of the four categories. The ninth in DEFG% over the last 20 games is really exciting. In addition, the Jazz have long been notorious for the amount they foul—and that has subsided. Finally, the Jazz have moved to above average in defensive rebounding despite playing with a stretch 4.

The only area where the Jazz have been inadequate is their lack of forcing turnovers.  Ranking 30th doesn’t tell the whole story. The current rate of forcing turnovers over the past 20 games is historically low at only 11.8% of opponents possessions.

Overall, the Jazz have improved from ranking 30th defensively in the first 25 games to 23rd, and if they can begin to force some turnovers they will be near average in a hurry.