I have seen this in two orchards. The underlying flesh looks fine, no discoloration. No sporulation appears overnight when incubated at room temperature in a closed plastic bag. The spots do not seem to be the result of insects or bruising. The fruit were not hydrocooled or put over a grader.
Symptoms resemble peach mosaic virus.
3 - single peach Immature peaches, variety A9, with suspected severe powdery mildew symptoms. 5 peaches closeup of peach 3 peaches in field another picture Concord vineyard with leaf symptoms. The brown necrotic symptoms are probably due to Karmex as well. The larvae are feeding both on the surface and burrowing into the twig. The entrance holes are anywhere along the limb with this pest as opposed to oriental fruit moth that enters only at the terminal tip.