Life Country singer Hal Ketchum has Alzheimer’s disease, performed ‘as long as it was possible’ April 15, 2019Cindy Watts, Nashville TennesseanComments Off on Country singer Hal Ketchum has Alzheimer’s disease, performed ‘as long as it was possible’ Hal Ketchum's wife, Andrea, revealed her husband's diagnosis of Alzheimer's disease in a Facebook post over the weekend.