Bertsmobile1, thanks for the detailed response!
It turns out the leak is coming from the sump gasket but several of the bolts were loose. I tightened those up and ran the mower for 15 minutes to heat and thin the oil.
There was only the smallest hint of oil in one spot by the gasket after running the mower (would barely be visible on a rag if wiped up).
So, not a perfect fix but a heck of a lot easier, quicker, and cheaper than replacing the sump gasket.
Hopefully, it holds as I know this isn't a permanent fix, but I am a happy camper now!
Thanks again!