http://www.nytimes.com/2013/02/27/sports/football/nfl-will-use-ipads-to-expand-in-game-concussion-testing.html?nl=todaysheadlines&emc=edit_th_20130227&_r=0
Hockey is seeing an increase in concussions too.
http://www.nytimes.com/2013/02/27/sports/hockey/another-wave-of-concussions-hits-nhl.html?nl=todaysheadlines&emc=edit_th_20130227