Has there ever been a 12–3 in the Liga MX?

Never.

It would be a scorigami. Based on the average number of goals in the Liga MX, the chance of a game ending 12–3 is about 1 in 65,573,973.

Nearby scores

1. 13–2 Never
2. 13–3 Never
3. 13–4 Never
4. 12–2 Never
5. 12–3 Never
6. 12–4 Never
7. 11–2 Never
8. 11–3 1 time
9. 11–4 Never