NFL Concussions: The 2013-14 Season In Review
The NFL Needs to be More Proactive in Preventing Concussions
New York Times: Steve Young's concussions omitted from NFL study
What We've Learned From Two Years of Tracking NFL Concussions
NFL Team Needs: Prioritizing Every Roster's Biggest Weaknesses After Week 3, News, Scores, Highlights, Stats, and Rumors
An overview of concussion protocols across professional sports leagues - LawInSport
Watch Super Bowl 100: How the NFL Can Survive the Concussion Epidemic, SB 100
Concussions remain at the forefront of high school athletics, Sports
Concussion testing doesn't work as well for athletes with disabilities.
A former Harvard quarterback tackles NFL concussion woes
NFL Health and Safety Fact Sheet
Most College Football Head Impacts Occur in Practice, Not Games
Soccer Concussions: Myths, Facts, & Recovery