Forrest Gregg links his Parkinson’s Disease to concussions

Pro Football Hall of Famer Forrest Gregg has revealed that he has Parkinson’s Disease. And he thinks his football career may have caused it. Gregg told the Associated Press he, his family and his neurologist believe the disease may be linked to concussions he suffered during his playing career. The 78-year-old Gregg, who was diagnosed…