Fernando Valenzuelas cause of death has been determined after theDodgerslegenddied last month at 63.

Symptoms of the disease can include severe mental deterioration and dementia as well as involuntary muscle jerks.

Watch on Deadline

Fernando Valenzuela was one of the most impactful players of his generation.

Fernando Valenzuela

Fernando ValenzuelaStephen Dunn/Getty Images

Fernando Valenzuela waves to fans after throwing the ceremonial first pitch during the 92nd MLB All-Star Game presented by Mastercard at Dodger Stadium on July 19, 2022 in Los Angeles, California.