It's true: Lions' Megatron Calvin Johnson will retire from football at age 30
Calvin Johnson camp at Detroit Lions facility: Photos
Former Detroit Lions WR Calvin Johnson's Megatron Camp in Pontiac
DETROIT LIONS: Calvin Johnson still amazes every day WITH VIDEO – The Oakland Press
Hard Count Athletics - Calvin Megatron Johnson Jr Camp
Lions News: Calvin Johnson to host football camp at Detroit's team facility - Pride Of Detroit
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Ex-Detroit Lions WR Calvin Johnson making 'Mega' impact in retirement