A Cal football player who collapsed in February during a training run outside Memorial Stadium died of a heart condition that has been a common cause of sudden deaths among athletes, authorities said Wednesday. Ted Agu, 21, died of hypertrophic cardiomyopathy, or excessive thickening of the heart muscle, according to the Alameda County coroner's office. Cal's athletic department has established the Ted Agu Memorial Scholarship Fund to create a scholarship endowment for student-athletes.