Lions' receiver Calvin Johnson retires after nine seasons - The Boston Globe
Calvin Johnson's beef with Detroit Lions shows no signs of ending
Detroit Lions receiver Calvin 'Megatron' Johnson retires from the NFL at age 30 - Los Angeles Times
Lions' Calvin Johnson Reveals Origin of Megatron Nickname
Lions' Calvin Johnson Defies Description - The New York Times
Calvin Johnson not the first Detroit Lion to support abstinence, but many fans applaud his message
Detroit Lions unveil Barry Sanders statue at Ford Field
With Johnson's likely retirement, search for new No. 1 WR begins, PFF News & Analysis
Barry Sanders: Calvin Johnson retiring 'would be devastating'
Calvin Johnson makes Pro Football Hall of Fame on first try amid star-studded class
Calvin Johnson And Barry Sanders Legends Of Detroit Lions Shirt - Freedomdesign