Switching everything sends the bill to the centre

Defending screens by switching looks tidy on film and quietly loads a big man's hips with work he was never built for.

Switching solves the screen. It really does. Nobody has to navigate anything, nobody gets caught on a body, and the offence gets a mismatch rather than an advantage, which is a smaller problem. On a whiteboard it is close to elegant. The cost does not show up on the whiteboard because the cost is measured in a seven footer's groin.

A centre in a drop scheme spends a possession moving mostly forwards and backwards, in a straight line, with occasional lateral steps. A centre in a switch everything scheme spends the same possession sliding sideways in a low stance against a guard who is trying specifically to make him change direction. Those are different physical tasks. The second one loads the adductors and the hip flexors in a way the first does not, repeatedly, for eighty two games.

I think this is under-discussed relative to the attention given to minutes and back to backs. Load management conversations are almost entirely about volume. Very little of it is about composition, which is odd, because the same thirty minutes played in two different schemes are not the same thirty minutes at all.

There is a selection consequence that teams have already absorbed without saying it out loud. The value of a mobile big has risen, sure. But the durability of mobile bigs asked to switch has not obviously kept pace, and the injury patterns that end their seasons cluster around exactly the areas that lateral defensive work stresses. Correlation, not proof, and I would still bet on the mechanism.

What I would want from a team building a defence is honesty about the trade. If you are going to switch across all five positions, you need two bigs capable of it and you need to plan to use both, which costs money and roster spots that most front offices would rather spend on shooting. Switching with one big and hoping is not a scheme, it is a plan to be worse in April.

The alternative is to switch selectively, by opponent and by quarter, and accept that some nights the point of attack defender is going to get screened off and give up a three. That looks worse on film. It is a lot cheaper over eight months, and the film is not the thing you are trying to win.