Has there ever been a 9–0 in MLS?

Never.

It would be a scorigami. Based on the average number of goals in MLS, the chance of a game ending 9–0 is about 1 in 52,090.

Nearby scores

1. 10–0 Never
2. 10–1 Never
3. 9–0 Never
4. 9–1 Never
5. 8–0 Never
6. 8–1 1 time