Calvin Johnson: Lions told him to change concussion story
Lions' receiver Johnson retires, minus the fanfare
Detroit Lions – Reaction to retirement of Calvin Johnson, a 'humble superstar' – The Oakland Press
After Calvin Johnson retirement, sources say Lions signing Marvin J.. - ABC7 Chicago
Detroit Lions' Calvin Johnson joins this list of star athletes, including Barry Sanders, who retired early - ESPN
Calvin Johnson Sends Message to Lions WR Jameson Williams
Detroit Lions Legend Calvin Johnson looks forward to meeting WR rookie Jameson Williams
Ex-Detroit Lions WR Calvin Johnson making 'Mega' impact in retirement
Calvin Johnson is jealous of Matthew Stafford's Lions escape
Former Lions WR Calvin Johnson trading in the NFL for … college – New York Daily News