Examining the Shot Clock, Shot Defense and Shot Location

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knarsu3
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Joined: Thu Apr 14, 2011 11:25 pm

Re: Examining the Shot Clock, Shot Defense and Shot Location

Post by knarsu3 »

AcrossTheCourt wrote: By the way, I just read this:
Stotts takes it one step further, suggesting that dismissing midrange shots is a fatal strategy. “It’s not easy getting to the basket, and it’s not easy getting open shots in this league,” he says. “Half of the guys in the league, I would not want to leave open at 15 feet. An open midrange shot is a quality shot in this league. Teams basically make twice as many shots if they’re uncontested. If they’re contested, they make 30 percent; if they’re uncontested, they make 60 percent.”
What are his source? What do you think of that?

http://grantland.com/features/portland- ... -aldridge/
Since Stotts is talking in generalities here and not about any specific player, then I think it's safe to say he's just wrong. I've done the research on this. Vantage tracks open shots as no defender within 5 feet and most open mid-range shots fall in between 45-50%. Obviously it varies depending on the zone (I've broken it down by zone and shot defense) but the highest open FG% was at the Left Hash, where it's a 53% shot.

Also, his numbers seem to be speaking in generalities, which I assume indicates he hasn't done the research. Again, wrong. There is a big difference between uncontested and contested but thats at the basket where it's around 20%. In the mid-range/3 area, it's about 10%, sometimes less. 30% is a bit extreme.

FYI, the %'s are broken down by shot defense for threes in this article: http://blog.cacvantage.com/2014/01/defending-three.html
The splits aren't much different for mid-range shots.

Now if he wants to talk about specific players, that's a different debate. Obviously players are going to have different splits from the league. For example, I believe Bosh was around 58% on open mid-range shots, obviously much higher than the league.
Mike G wrote:I'm guessing it's rather a description of the extremes. Seldom is a player truly wide open at 15', unless he's an incompetent shooter. League-wide, such shots might be made at 60%, with many players doing better than that.

And not that often does someone have to take a seriously contested shot at that distance. At mid-range, you can usually give it up to a teammate further out or closer in. At some level of 'contestedness', due in part to the clock, players shoot <30%.

Players and teams have always and will always take what the defense allows. Has there been a successful team that swarms the arc and protects the rim, while literally giving opponents the open mid-range shot?
How do you want to define open? From what we do have (defender not within 5 feet), the %'s are around 45-50%, with the Left Hash being 53%. Now maybe Chris Bosh shooting at the Left Hash is at 60% but I wouldn't say that for the whole league.

Yeah, I think there's no doubt there's varying degrees of contestedness, as you can see that with the shot clock numbers.

Well the Rockets D-League team has been trying out that on offense (no mid-range shots) and I believe they're one of the most efficient D-League teams. Also, has anyone tried what you've said? Furthermore, I think it's more difficult to swarm BOTH the rim and the arc. Pacers might be the best example of that. From a few weeks ago: Image

I'd argue the best defenses are able to do both obviously but they have to be weak somewhere right? If it means you can swarm both the rim and 3 point shot but give up open mid-range shots, I think it makes sense. Problem is I think it's more difficult to swarm both the rim and arc then anyone realizes.
Mike G
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Re: Examining the Shot Clock, Shot Defense and Shot Location

Post by Mike G »

Well, at the extreme of openness, a 15' shot is a free throw. Players make 90% from a given angle, so I'd guess they make 80% over multiple angles when they can get them. I can make 60%, fercrisake.

Stotts said: "Half of the guys in the league, I would not want to leave open at 15 feet."
The other half, it would seem, he would not mind leaving open.

At the extremes of contestedness, I think a 2:1 ratio of makes is plausible. The player who shoots .500 when unguarded at the arc may only shoot .250 when blanketed. That's not even an extreme case. Someone like Steve Novak might make 60% when wide open and 20% with a defender in his face. For Steph Curry, the difference range might be only .500 vs .350

An uncontested dunk is close to 100% for many players; mano a mano, it's a 50-50 proposition.
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