Has there ever been a 9–2 in the Liga MX?

Yes, 6 times.

The first time: November 7, 1943, ADO beat Atlas (ADO 9–2 Atlas).

The last time: April 13, 2019, Pachuca beat Veracruz (Pachuca 9–2 Veracruz), 7 years ago.

Home wins: 5. Away wins: 1.

Nearby scores

1. 10–1 2 times
2. 10–2 1 time
3. 10–3 1 time
4. 9–1 1 time
5. 9–2 6 times
6. 9–3 2 times
7. 8–1 5 times
8. 8–2 11 times
9. 8–3 1 time

All games

1. April 13, 2019 Pachuca 9–2 Veracruz
2. November 3, 1946 Atlas 9–2 América
3. May 19, 1946 Marte 2–9 España
4. March 24, 1946 Guadalajara 9–2 Monterrey
5. December 13, 1945 Atlante 9–2 San Sebastián
6. November 7, 1943 ADO 9–2 Atlas