Calvin Johnson injury: Detroit Lions head coach Jim Caldwell says 'We'll see' about week 5 - Sports Illustrated
Ben Roethlisberger is “proud” of himself for leaving game with concussion symptoms - Behind the Steel Curtain
Mike Neal (hip) only player unable to practice
Calvin Johnson makes Pro Football Hall of Fame on first try amid star-studded class
Lions notes: Calvin Johnson wins award, fines from Thanksgiving and more - Pride Of Detroit
Calvin Johnson says he had a concussion; Lions say no
Calvin Johnson reveals the scary truth behind NFL injuries
Former NFL Stars Gronkowski, Johnson Detail Concerning Concussion History – Seltytending
Detroit Lions' Calvin Johnson bitten by the injury bug again