US soccer officials to discuss head injuries as 4 more ex-players diagnosed with CTE

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FILE - Miami Fusion's Tyrone Marshall (15) assists Kansas City Wizards' Scott Vermillion after the two collided while going up for a header in the first half of a soccer match Aug. 29, 1999, in Kansas City, Mo. Four more former professional soccer players have been diagnosed with chronic traumatic encephalopathy. The Concussion Legacy Foundation says they were found to have the degenerative brain disease that has been linked to concussions in athletes, combat veterans and others who have sustained repeated head trauma. (AP Photo/Ed Zurga, File)