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How multiple research groups and the NFL battled over Junior Seau's brain to lead the science of concussions.

Tyrann Mathieu is out of rehab and living alone, trying to convince himself (and NFL GMs) that he's more than his old habits and nicknames.

How Roger Goodell made the NFL bigger, richer and more powerful -- and now more divided -- than ever before.

Football made George Visger the man he is today, for better and for worse.

Lost Heroes of the Super Bowl

Roberto Clemente got his 3,000th hit, sent his bat to Cooperstown, and three months later he was dead. He left behind a puzzle that has taken 40 years to piece together.

Tracing Cam Newton's journey to the NFL.

Lisa McHale never understood why her husband became addicted to painkillers. Could his brain have held the reason?

Pain, painkillers commonplace for many NFL players, though league and medical staffs have tightened up access

Learn about painkiller misuse resources and treatment options, and view additional video clips and photos.

First scientific study of prescription painkiller use by retired NFL players shows higher rates of misuse than general population, possibly due to use during playing days

ESPN commissioned the first-of-its-kind study, and the National Institute on Drug Abuse joined as a partner.

Twenty years ago, a perfect storm of events led to arguably the biggest blunder in college football history.

Mack Brown is the face of the Longhorns to players, recruits, boosters and fans alike. And his charismatic presence is felt everywhere around the Texas program.

The inside story of how "Madden NFL" became a video game dynasty.

At 28 percent of the venues, more than half of the concession stands or restaurants incurred at least one "critical" or "major" health violation