Drop coverage did not die, it just stopped being the default

Sagging the big man to protect the rim still works against most ball handlers, and the exceptions are why nobody says so.

Every few years someone declares a pick-and-roll coverage dead, and every few years it turns up in a conference final because a coach noticed the personnel had changed.

Drop is the simplest answer to a ball screen. The big retreats towards the rim, the guard fights over the top, and the offence is invited to take a pull-up jumper from around the free-throw line. That invitation used to be a good bet, because the mid-range pull-up is the least efficient shot on the floor, and giving up the least efficient shot in exchange for taking away the rim and the corner is exactly the trade a defence wants.

Then a generation of guards learned to make that shot at a rate that broke the arithmetic. Against a handler who is genuinely comfortable pulling up from fifteen feet, drop stops being a trade and becomes a concession. Hence the shift to switching, to blitzing, to the various half-measures where the big shows and recovers.

What got lost in the fashion cycle is that this only applies to a small number of players. Most ball handlers in the league are not comfortable taking that shot, and against them drop remains the cheapest coverage available, because it requires no rotations, no scrambling, and no risk of the roll man catching four feet from the rim with a mismatch on his hip. It costs one defender doing his job instead of five doing something complicated.

So the good defensive teams run a mixed portfolio, and the tell is that they are choosing per player rather than per team. Drop against the wing who cannot shoot off the dribble. Switch against the guard who can. Blitz the one man who beats you both ways, and accept the four-on-three behind it for a possession or two.

The reason this is hard is not tactical, it is human. A big man who spends the first quarter in drop and the second quarter switching onto guards is being asked to play two different positions with two different sets of instincts, and the mistakes happen in the transitions between them.

Which is why the most valuable defensive centre is not the best rim protector. It is the one who can be told to do three things and get all three roughly right.