Football greats Dwight Clark, Gale Sayers battle brain diseases
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Football greats Dwight Clark, Gale Sayers battle brain diseases
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Football greats Dwight Clark, Gale Sayers battle brain diseases
NFL: Gale Sayers, Dwight Clark have serious health problems
NFL: Gale Sayers, Dwight Clark have serious health problems
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Football greats Dwight Clark, Gale Sayers battle brain diseases
Former NFL stars Sayers, Clark latest to suffer sport's head trauma