ESPN
11-13-2013, 05:10 PM
Pop Warner youth football saw participation drop 9.5 percent between 2010-12. Officials said several factors played a role, but the organization's chief medical officer cited concerns about head injuries as probably "the No. 1 one cause."
http://espn.go.com/espn/otl/story/_/page/popwarner/pop-warner-youth-football-participation-drops-nfl-concussion-crisis-seen-causal-factor
http://espn.go.com/espn/otl/story/_/page/popwarner/pop-warner-youth-football-participation-drops-nfl-concussion-crisis-seen-causal-factor