The doosra faded and off-spin got better without it

Losing the mystery ball forced a generation of finger spinners to learn the boring stuff, and the boring stuff works.

For about a decade every young off-spinner wanted one delivery. The one that went the other way. Coaches taught it, academies drilled it, and a lot of promising bowlers spent their teenage years wrecking their elbows chasing a ball they could not legally deliver.

Then the throwing regulations got enforced properly, remedial action became routine, and the doosra largely receded from the top level. Various people said off-spin would die with it.

Off-spin has never been in better health, and I would argue the two facts are connected.

Here is why. The doosra was an answer to a specific problem: a right-arm finger spinner has nothing that threatens the outside edge of a right-handed batter, so he cannot set up a dismissal, he can only wait for a mistake. The doosra solved that with a wrong-un. What replaced it solved the same problem with geometry instead. Bowl from wider on the crease. Change the angle rather than the spin. Use the arm ball that holds its line with scrambled seam, which is legal, repeatable, and nearly as hard to read from twenty-two yards if the hand looks identical.

More importantly, spinners stopped treating variation as the whole plan. The best finger spinners now attack with over-spin and drift, which is dull to describe and lethal to face. A ball that dips two feet late is doing something the batter's feet have already committed against. Pair that with a change of pace of five kilometres per hour and you have created uncertainty about length, which is where wickets come from. Uncertainty about direction is a bonus.

The other thing the doosra era got wrong was flight. Everyone bowled flatter, because the doosra needs to be pushed through to survive. Take it away and spinners started tossing it up again, which is how you get the stumping, the caught at short leg, and the batter driving on the up with the ball not there.

I do not particularly miss it. A mystery ball buys you two or three seasons before the analysts crack it. Drift and dip do not expire. If I were coaching a fifteen year old off-spinner I would not let him attempt one until he could land six identical balls on a coin, and by then he would probably have worked out that he does not need it.