At Crockett Park, the city of Brentwood will sometimes pick up left items at that park. They then could take the item to their location on 1750 General George Patton Drive. Their phone number is 615-371-0080. Here is the link for the Lost & Found the city maintains.

The same would apply for Granny White Park.

At Civitan Park, there is a lost & found bin up at the clubhouse. We do not pick up and place items there but they sometimes end up there.