MLB legend Pete Rose died from heart disease ... officials announced Tuesday.
According to the Clark County Office of the Coroner/Medical Examiner in Nevada ... the official cause of death for Rose was determined as hypertensive and atherosclerotic cardiovascular disease.
Rose had also been battling diabetes mellitus, officials added.
His death was ruled a natural one.
TMZ Sports broke the story ... Rose was found dead by a family member in his Las Vegas home on Monday afternoon.