Q.My peaches are small (size of a tennis balls)
My peaches are small (size of a tennis balls), hard, and oozing a clear, sticky liquid. The leaves are sparse and thin (like paper). I don’t know if they are salvageable or even if the tree is. What can be done, what is the cause?

There are several insects that can cause deformed and oozing fruit. This article has information: http://www.clemson.edu/extension/county/laurens/mg/askmg/076_peach_tree_worms.pdf
Also there are fungal diseases that might cause this. To correctly diagnose the problem, take some fruit samples to the Extension Service. This link will help you locate the nearest one: https://www.gardeningknowhow.com/extension-search/