Detroit Lions receiver Calvin Johnson officially retires from NFL
Lions wide receiver Calvin Johnson retires from NFL
Vikings React to Calvin Johnson's Retirement
Calvin Johnson brings an end to nine-year career with Detroit Lions, NFL News
Calvin Johnson retires: 'I have played my last game of football' - ABC7 Chicago
It's true: Lions' Megatron Calvin Johnson will retire from football at age 30
Where is Calvin Johnson now? What the Lions legend is doing after his early 2015 retirement
Former NFL WR: Calvin Johnson 'definitely redefined the position'
Detroit Lions pushing Calvin Johnson for retirement decision
Lions' Calvin Johnson retires officially after nine NFL seasons - Acme Packing Company