5 NFL players who were sent into retirement by concussions
The NFL and Mainstream Media on Concussions – PR in Practice: Concussions in Sports
Vontae Davis Explains Why He Retired at Halftime
Retired NFL Players: 'We Were Paid to Give Concussions' - Sports Illustrated
Retired Black players say NFL brain-injury payouts show bias
Late For Work 12/27: Brandon Stokley Announces Plans To Retire
Buffalo Bills Sign RB Ty Johnson to Active Roster, Place Damien Harris on IR - Tracker - Sports Illustrated Buffalo Bills News, Analysis and More
NFL, former players reach $765 million settlement over concussions
NFL health executive recognizes link between football and CTE for first time ever – New York Daily News
NFL concussion settlement leaves former players struggling for relief
WholeHogSports - State of the Hogs: Concussion remains important topic for past, present Razorbacks
Dig Deeper: Investigating the NFL's Concussion Crisis
NFL hopes to reduce head injuries with helmet experiment – WWLP
SportsCenter - Calvin Johnson, Jr. says he is sure that he suffered at least nine concussions in the NFL, one for every season he played. (via Sports Illustrated)