Calvin Johnson's Retirement Reveals Pain Impossible to Ignore for NFL Players, News, Scores, Highlights, Stats, and Rumors
Cowboys opponent preview: How will the Lions fill the void left by the retirement of Calvin Johnson?
Lions wide receiver Calvin Johnson announces retirement after nine seasons - Washington Times
Megatron retires at 30 — because he's smart
Calvin Johnson: Detroit Lions WR retires - Sports Illustrated
It's true: Lions' Megatron Calvin Johnson will retire from football at age 30
Former Lion Calvin Johnson makes it into Pro-Football Hall of Fame on first try
Lions' star WR Calvin Johnson to retire - Bucs Report
Ex-Lions star Calvin Johnson reveals that he used to break one particular NFL rule after every game