Early NFL Retirement: Lessons Learned From Luck, Brown, Sanders & Johnson - Windy City Gridiron
Where is Calvin Johnson now? What the Lions legend is doing after his early 2015 retirement
Calvin Johnson Opens Up About Retiring From The NFL At 30, ALL THE SMOKE
Lions' Calvin Johnson Retires From NFL - CBS Chicago
Calvin Johnson's Lions relationship 'trending up' after acrimonious split
Calvin Johnson is jealous of Matthew Stafford's Lions escape
Calvin Johnson retiring will benefit the Lions – The Milford Messenger
Detroit Lions' Calvin Johnson paid back part of bonus before retiring
Calvin Johnson retires, which means Eagles won't face him in 2016 - Bleeding Green Nation
Detroit Lions Star Wide Receiver Calvin Johnson Unexpectedly Retires
Detroit Lions WR Calvin Johnson is skipping the Pro Bowl, as usual - ESPN - Detroit Lions Blog- ESPN