According to the San Jose Mercury News, former Raiders owner Al Davis’ death was due to heart failure.
Davis’ death certificate states that he died at the Oakland Airport Hilton at 2:45 a.m. on October 8 from congestive heart failure, cardiomyopathy, and ventricular fibrillation. Davis’ heart is believed to have begun to fail just 24 hours before his passing, “likely from five years of living with heart disease.”
The document also shows that Davis had throat surgery on October 5 and was suffering from Markel cell carcinoma, a form of skin cancer obtained from sun exposure.
Davis was 82 when he died.