Rocastle announced that he was suffering from non-Hodgkin's lymphoma, an aggressive form of cancer which attacks the immune system, a few months before his death. He underwent a course of chemotherapy and was hopeful of a recovery. He then died aged 33. Rocastle was survived by his wife and children. Many years later, it was revealed that Rocastle's cancer had been declared terminal from the time of his diagnosis in October 2000.