Calvin Johnson talks retirement, says he was fed up with football
How did Calvin Johnson reach the point of considering retirement? - ESPN - Detroit Lions Blog- ESPN
Detroit Lions Star Wide Receiver Calvin Johnson Unexpectedly Retires
Pain Rankings: No. 4, the Detroit Lions
Understanding Lions WR Calvin Johnson's quiet retirement - Sports Illustrated
Nine ridiculous stats that define Calvin Johnson's career
New Orleans Saints 45 Detroit Lions 28 - as it happened, Sport
NFL Star Calvin Johnson Retiring
Calvin Johnson: I wanted to play elsewhere, Lions wouldn't let me : r/nfl
All 14 Receptions from Calvin Johnson's 329 Yard Game Ranked – M-FANS
The Truth About Calvin Johnson and the Oakland Raiders - Last Word on Pro Football