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

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

Study Reveals How Concussions Can Trigger Depression | TIME.com

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

The Tragic Risks of American Football | TIME

Football Brain Injury: We Need Hit Counts Like Pitch Counts | Time

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

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

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