Concussion Expert: "Sweetness" Likely Had Degenerative Disease - NBC Chicago

    Concussion Expert: "Sweetness" Likely Had Degenerative Disease

    Chris Nowinski believes Walter Payton's issues mirror those exhibited by former Bear Dave Duerson, who committed suicide in February. (Published Thursday, Sep 29, 2011) Chris Nowinski believes Walter Payton's issues mirror those exhibited by former Bear Dave Duerson, who committed suicide in February. See More