Calvin Johnson says he learned to play through concussions during
Calvin Johnson: Detroit Lions 'wanted me to change my story' about
Report: Calvin Johnson says Lions 'wanted me to change my story
Calvin Johnson: Lions told me to change concussion story
Calvin Johnson admits that he hid concussions from Lions team
Burleson, Lions Receiver, Is Injured in a Car Accident - The New
Detroit Lions WR Calvin Johnson says he played against Vikings
Might be time to consider hanging it up. Coby Fleener: Concussion
Detroit Lions: Calvin Johnson suffered no concussion or nerve
Calvin Johnson: Concussions played role in retirement
Calvin Johnson: Detroit Lions 'wanted me to change my story' about