John J. York, a 65-year-old actor known for his role as Mac Scorpio on 'General Hospital,' has opened up about his battle with myelodysplastic syndrome and smoldering multiple myeloma, both types of blood and bone marrow cancer. Diagnosed in late 2022, York underwent aggressive treatment, including chemotherapy and a bone marrow transplant, which allowed him to return to work. In an emotional interview on 'Good Morning America,' York expressed gratitude for the overwhelming support from fans and the many who signed up for bone marrow donation registries. Despite his health challenges, York has returned to filming 'General Hospital,' with his first episode airing on June 19. His journey has inspired many and brought attention to the importance of bone marrow donation.