If the ballfield pre-dates 1964, then it could be a legitimate loss/drop from back then. I'm 51 years old and I can remember when I was a young kid my dad bringing home a couple of Morgan and Peace dollars from the bank a time or two. There was also an elderly lady that lived two doors away from us that paid my two older brothers with a silver dollar for shoveling snow out of her driveway after a particularly bad winter storm. They weren't real common to see, but they did pop up every so often in change, or as a birthday gift.
Harley-Dog