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Former 49ers legend Dwight Clark announces ALS diagnosis

Dwight Clark, who authored the most iconic play in San Francisco 49ers history, announced on Sunday he has been diagnosed with ALS.

Clark turned 60 in January. He played nine NFL seasons, all with the 49ers, from 1979 to ’87.

According to the ALS Association, approximately 6,000 people in the United States are diagnosed with the disorder each year and an estimated 20,000 may be living with ALS in the U.S. at any given time.

He issued the following statement:

In September of 2015, I started feeling weakness in my left hand.