There used to be a cache nearby called lost tennis ball which I looked for multiple times to no avail. When I saw that it had been archived, I felt this park needed a new cache. My son found a lost baseball near here once, so it seemed a fitting name for the new cache, paying homage to the old but also to my own experience.
This is a popular park with plenty of muggles, especially on afternoons and weekends, so plan accordingly.