Q.Rotting Zucchini
I went outside to my zucchini garden here in Ohio and noticed that two of the zucchinis are completely rotted and wanted to know what I can do about it.

Certified GKH Gardening Expert
This could be due to many things. Unfortunately, I can't see the soil conditions or the leaves to see any other signs that might point to what is causing this.
These articles can help you to get started, though:
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-blossoms-falling-off-vine.htm