Luke Knox, FIU player and brother of Dawson Knox, dead at 22
Sports digest: Mizzou receiver Jalen Knox leaves team, could transfer
A.J. Green, National Football League, News, Scores, Highlights, Stats, and Rumors
A.J. Tarpley: Why I Walked Away from Football at 23 - Sports Illustrated
Johnny Knox Retires from Football Following Release from Bears, News, Scores, Highlights, Stats, and Rumors
Panthers' Luke Kuechly joins growing list of NFL players retiring early after injuries - ABC News
Conquering the Cycle: Lee Smith retiring on his own terms
Jalen Hurd, former Tennessee football star, injured, retires from NFL week after signing
87 out of 91 Deceased NFL Players Test Positive for Brain Disease - From Frontline : r/nfl
The Coach Says He's 'Built for Football.' His Parents Worry About C.T.E. - The New York Times
Dolphins signing XFL DB Bryce Thompson
Vols football: Jack Jones retires due to recurring injury
Former NFL Players Show Why Andrew Luck's Retirement Isn't a Surprise