Roger Pielke, who directs CU’s Sports Governance Center, has published an analysis of the numbers and whether health risks and concussions are driving the trend.
Lengthy recovery times for concussion are now the norm. But researchers say there's still a lot not known about the injury.
The league is reaching out to moms of young players to teach about health risks and concussion prevention, but some question the approach.
Every coach in the state who works with athletes ages 11 through 18 is required to take a course on how to recognize concussions.