No cases that I know of but unless there was a reported outbreak at the school, or it hit the news that there were cases in the area, we wouldn't necessarily know. Don't assume that because the grapevine hasn't picked up news of mumps beyond the NHL, there isn't any.
The mumps vaccine wasn't available until the late 60s-early 70s and wasn't widely, routinely given until later than that, and many people who are now adults did not get it even in the 70s or after because it wasn't required by their school systems, etc. So there are a LOT of unprotected adults walking around who may think they had the vaccine as kids but did not.
Add to that the fact that mumps and measles too are both back on the increase, due to misinformed parents refusing to vaccinate or parents just neglecting to keep up their kids' shot schedules, and the potential for even more widespread outbreaks is only going to increase.
Adults today didn't live through deaths due to measles or mumps but both can be fatal. We've forgotten that or just refuse to believe it, and instead, many parents believe the vast fraud started when a doctor in Britain faked up a study...and the lie has spread and been perpetuated online for a decade. (Search "Dr. Andrew Wakefield" to read about the now discredited "study" that kicked off the whole "MMR vaccine equals autism" nonsense).
So I fear it's going to take some serious outbreaks and probably some deaths to make people wake up again and get kids vaccinated and get boosters (or first-time shots) for adults. Same goes for flu and flu shots; people refuse to get them, but don't realize that flu can be fatal, especially to young kids. Or they just say, "Well, yeah, it kills people each year but that's only old people and sick people, not healthy kids like mine...."
To answer the question, yes, I know I had the MMR vaccine as a child, but am probably going to ask my doctor about a booster this spring because we travel a lot and that only increases our exposure. Vaccines do wane over time and with the outbreaks, however small, of diseases people thought we'd "beaten," I want to do what I can.