Former San Diego Chargers linebacker Billy Ray Smith Jr. died on Wednesday, July 29, following a bout with what his family called CTE-caused dementia. He was 64.

“It is with profound sadness that we share the loss of our beloved Billy Ray Smith Jr., who passed away peacefully surrounded by family,” read a statement from his family, shared with the Associated Press . “Billy Ray faced his long journey with dementia caused by CTE with unmatched bravery, dignity, and strength. Billy Ray brought so much joy, light, and laughter to the world as a devoted father, husband, son, and loyal friend.”

CTE, or chronic traumatic encephalopathy, is a…

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