At least a dozen NFL players have suffered from ALS
NFL notebook: Former 49ers wide receiver Dwight Clark dies
Lowell Cohn: Friends and fans sharing pain as 49ers great Dwight
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Dwight Clark dead: 49ers great who made 'The Catch' dies at 61
Former Clemson receiver Dwight Clark diagnosed with ALS
Former 49ers wide receiver Dwight Clark dead at 61 - Las Vegas Sun
Ex-49ers star shares candid update on ALS battle, Dwight Clark Day
Former 49ers receiver, Browns executive Dwight Clark dies at 61
Dwight Clark, 49er great who made 'The Catch,' dies at 61
Former 49ers wide receiver Dwight Clark dead at 61
Ex-49ers star shares candid update on ALS battle, Dwight Clark Day
49ers legend Dwight Clark announces ALS diagnosis