Ex-Lion Calvin Johnson: 'I'm not coming back'
Calvin Johnson continues the trend of NFL stars retiring early
Detroit Lions star WR Calvin Johnson retires after 9 seasons
Patrick Peterson has great message for Calvin Johnson
Drew Sharp: Leave it to Lions to lose Calvin Johnson
Johnson remarkably candid in E:60 interview
Athletes who retired early
NFC North opponents laud Calvin Johnson as he contemplates retirement - ESPN - Detroit Lions Blog- ESPN
Detroit Lions land 5 players on ESPN's all-decade team for NFC North
After Calvin Johnson retirement, sources say Lions signing Marvin J.. - ABC7 Chicago
Lions WR Calvin Johnson retires from NFL – New York Daily News