Has there ever been a 9–4 in the La Liga?

Yes, 1 time.

The only time: October 8, 1950, Athletic Bilbao beat Celta de Vigo (Athletic Bilbao 9–4 Celta de Vigo).

Nearby scores

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