[San Jacinto]

A no-no means “no hits, no runs”. Hence two “no’s”. Santana threw a no-hitter. He did not throw a no-no.

[CT-Freeper]

A “no-no” is just a slang way of saying “no-hitter.” It doesn't necessarily mean no hits and no runs.

It is true that it wasn't a perfect game, because there were walks, errors and runs.