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Does Dan Rosenbaum's defensive adjusted +/- accurately measure the defensive abilities of select top defensive point guards (according the the statistics)? The key point guard in question is Baron Davis. I have always been under the impression that Davis is an elite defender though has been limited because of his injuries slowind down his mobility and lateral quickness. I know there are others who disagree that Davis is even a good defender. I understand that adjusted +/- has its flaws especially with point guars but I still feel that Davis has been a great defender for the last few seasons. He may have declined recently but his standard error is fairly low. Basically, do you hold defensive adjusted plus/minus in high regards considering Davis' inclusion amongst the best defensive point guards according to these statistics?

Note: the article is old and does not reflect the current season whatsoever.

Marcus Banks is another story.

					Overall		Percentiles		Adjusted +/-
	Player		Age	04-05 Minutes	Rating	Std Error	Adj +/-	Stat +/-	02- 03	03- 04	04- 05
1	Chris	Duhon	23	2,177	3.7	1.6	98	98	0.0	0.0	3.8
2	Marcus	Banks	24	1,145	2.3	1.7	95	91	0.0	-2.1	4.8
3	Earl	Watson	26	1,808	2.0	2.0	96	62	4.2	2.7	3.3
4	Jason	Kidd	33	2,436	1.2	1.6	88	95	0.6	2.5	1.3
5	Eric	Snow	33	1,844	1.1	1.2	86	93	2.1	0.9	1.7
6	Beno	Udrih	23	1,149	1.0	1.9	91	76	0.0	0.0	1.1
7	Steve	Francis	28	2,978	0.9	1.7	92	68	1.9	1.9	1.3
8	Jason	Hart	28	1,887	0.8	2.0	85	82	0.0	5.6	1.0
9	Baron	Davis	27	1,581	0.7	1.6	90	70	4.5	1.3	-0.2
10	Speedy	Claxton	28	1,866	0.3	1.3	78	80	-0.2	1.0	0.1

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cpawfan

The standard deviation on those numbers really makes me question their true value. I have a lot of trouble with an error rate twice the size of the rating number.

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johnston797

There was a lot of discussion on the Bulls boards about these numbers because Duhon was so high and Gordon was equally high for SGs. Gordon's number didn't seem to jive with game observaations. So it was controversial.

Granted, I can only look at the raw defensive +/-, not the adjusted, but it looks like each player would be in the middle of the pack this year.

So way too much variation in the stat IMHO to weight it too heavily

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