Stop grading the shot, grade the possession

The unit of basketball is not the attempt but everything from the inbound to the moment the other team touches the ball.

Here is a possession. Guard brings it up, swings it, the wing drives baseline, gets cut off, kicks out late, the ball goes around to a shooter with three on the clock and he fires a contested three off balance. Brick.

Every shot quality model in existence grades that as a terrible attempt. Which it was. But the attempt is not the thing that went wrong. The thing that went wrong happened eighteen seconds earlier, when the first swing pass took a beat too long and the defense got its feet set. The bad shot was a symptom that arrived at the end of a bad process, and grading the symptom teaches you nothing about the disease.

This is my complaint with the whole shot-first vocabulary. It has an inbuilt bias toward blaming the last man to touch the ball. He is the one whose name is attached to the miss. Meanwhile the player who killed the possession by refusing a pass, or by cutting into a teammate's driving lane, or by setting a screen at the wrong angle so the coverage never had to make a decision, walks away clean.

Possession-level thinking flips who gets credit. Points per possession is old and unglamorous and still the best number we have, because it does not care how the points arrived. A team scoring 1.12 per possession through ugly offensive rebounds and free throws is beating a team scoring 1.04 through beautiful ball movement, and no amount of aesthetic preference changes that.

The bit I would push further is the second-order effect. A possession is not only worth its points. It is also worth the state it leaves the other team in. Getting a shot up with ten on the clock, with three men above the ball, is worth less than the same shot with your defense already balanced, because the first version hands over transition chances you never see in the box score. Nobody prices this. It shows up as your defense being mysteriously worse than it looks on tape.

Grade the possession. Ask whether the offense created a decision the defense could not make, and whether it ended in a place you could defend from. If the answer to both is yes, the miss is fine. Take it again tomorrow.