gambitx777 wrote:His 3 point % went down because he left Wall and went to a team with no true PG and a high volume shooter like harden, filled with other guys who need the ball, a lot. Washington was, and still is a better fit for Ariza than the rockets.
Tough to say. The data is equivocal. It COULD be "Wall Effect" but it could also have just been a normal reversion to the mean.
Ariza didn't really shoot threes until 2008-09. Since then, he's 896-258 -- .354. Bear with me through the mathy part: There's a standard deviation .034 during that stretch. His .407 shooting from 3pt range that season with the Wizards was 1.6 standard deviations above average, which is a pretty significant difference.
Here's his departure from average year by year:
- 2008-09 -1.1
- 2009-10 -0.6
- 2010-11 -1.5 (86% of minutes with Chris Paul)
- 2011-12 -0.6 (Paul traded; PGs: Greivis Vasquez & Jarrett Jack)
- 2012-13 +0.3 (1st season with Wiz; 45% of minutes with Wall)
- 2013-14 +1.6 (91% of minutes with Wall)
- 2014-15 -0.1
- 2015-16 +0.7
What numbers I was able to pull from nbawowy before the site got wonky showed Ariza shooting better from 3pt land with Wall (.414 to .324) -- I think that's all from the good year.
When I look at the numbers, the most likely explanation is that he's generally gotten better at shooting threes as his career has progressed. He had an outlier year from 3pt range in 2013-14 followed by reversion to the mean in 2014-15. The narrative that it's pure Wall Effect would require the following sequence: bad year from 3pt range playing with Chris Paul; better year from 3pt range playing more minutes with AJ Price than Wall; terrific year playing mostly with Wall; average year playing with meh PGs in Houston; and then shooting better again with still meh PGs in Houston.
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