Dwight Clark says he has ALS, suspects football a cause (Yahoo Sports)

Former San Francisco 49ers wide receiver Dwight Clark during halftime of an NFL football game between the San Francisco 49ers and the Cincinnati Bengals in Santa Clara, Calif., Sunday, Dec. 20, 2015. (AP Photo/Tony Avelar)

Dwight Clark says he has Lou Gehrig’s disease and suspects playing football might have caused the illness. Clark announced Sunday on Twitter that he has amyotrophic lateral sclerosis, a disease that attacks cells that control muscles. The former San Francisco 49ers wide receiver linked to a post on his personal blog detailing his ALS diagnosis, but the site crashed Sunday night, apparently from an overflow of traffic.


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