Has there ever been a 15–0 in all competitions?

Never.

It would be a scorigami. Based on the average number of goals in all competitions, the chance of a game ending 15–0 is about 1 in 8,283,456,328.

Nearby scores

1. 16–0 Never
2. 16–1 Never
3. 15–0 Never
4. 15–1 Never
5. 14–0 3 times
6. 14–1 Never