Concussion Doctor: Over 90% of NFL Players Have CTE | Time

Study Reveals How Concussions Can Trigger Depression | TIME.com

Brain Injury: CTE Found in 87% of Football Players' Brains | Time

Even Football Players Without Concussions Show Signs of Brain Injury

Watch Will Smith Take on the NFL in the New Concussion Trailer

Helmets and Mouthguards Don't Prevent Concussions | TIME.com

John Urschel on Giving Up Football for a Ph.D. in Math | Time

Playing Youth Tackle Football Is Linked to Brain Disease Symptoms ...

96% of Deceased NFL Players Found to Have Degenerative Brain ...