Has there ever been a 10–2 in the La Liga?

Yes, 1 time.

The only time: December 20, 2015, Real Madrid beat Rayo Vallecano (Real Madrid 10–2 Rayo Vallecano).

Nearby scores

1. 11–1 1 time
2. 11–2 1 time
3. 11–3 Never
4. 10–1 5 times
5. 10–2 1 time
6. 10–3 1 time
7. 9–1 5 times
8. 9–2 2 times
9. 9–3 1 time