Has there ever been a 9–3 in the Liga MX?

Yes, 2 times.

The first time: December 19, 1943, España beat Veracruz (España 9–3 Veracruz).

The last time: February 24, 1949, Marte beat Asturias (Marte 9–3 Asturias), 77 years ago.

Home wins: 2. Away wins: 0.

Nearby scores

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

All games

1. February 24, 1949 Marte 9–3 Asturias
2. December 19, 1943 España 9–3 Veracruz