Some interesting comments from that CTE doctor says that parents should be charged with child abuse if kids under 18 are playing contact football.
http://m.washingtontimes.com/news/2017/aug/8/concussion-doctor-says-high-school-football-child-/
http://m.washingtontimes.com/news/2017/aug/8/concussion-doctor-says-high-school-football-child-/