Calvin Johnson leaves a legacy in Detroit far beyond catches and
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Mega-gone: Calvin Johnson retires from NFL at age 30
Mega-gone: Calvin Johnson retires from NFL at age 30
Understanding Lions WR Calvin Johnson's quiet retirement - Sports
Detroit Lions getting trade calls on Calvin Johnson
Calvin Johnson retires: 'I have played my last game of football
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Detroit Lions receiver Calvin 'Megatron' Johnson retires from the
Calvin Johnson Retired in His Prime, But Where is Megatron Now