Jim Caldwell Says Calvin Johnson, Lions Will Work Out Differences, News, Scores, Highlights, Stats, and Rumors
Jerry Rice calls Calvin Johnson's possible retirement 'surreal'
Calvin Johnson - Wikipedia
Calvin Johnson's Retirement Reveals Pain Impossible to Ignore for NFL Players, News, Scores, Highlights, Stats, and Rumors
Retired receiver Calvin Johnson explains why he'll never play in the NFL again
How did Calvin Johnson reach the point of considering retirement? - ESPN - Detroit Lions Blog- ESPN
Calvin Johnson Chose Retirement Over the 'Insanity' of the Lions
Calvin Johnson - Wikipedia
Calvin Johnson: Career retrospective