Has there ever been a 13–6 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 13–6 is about 1 in 35,758,202,745.

Nearby scores

1. 14–5 Never
2. 14–6 Never
3. 14–7 Never
4. 13–5 Never
5. 13–6 Never
6. 13–7 Never
7. 12–5 Never
8. 12–6 Never
9. 12–7 Never