Calvin Johnson: 'I have played my last game'
I have played my last game of football': Detroit Lions' Calvin
Athletes who retired early
Calvin Johnson officially announces his retirement
Detroit Lions: Calvin Johnson Officially Retires from NFL
Calvin Johnson reflects on Hall of Fame career, has no regrets
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Lions' Calvin Johnson makes 'difficult decision' to retire
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Detroit Lions star WR Calvin Johnson retires after 9 seasons
Calvin Johnson: Detroit Lions Wide receiver retires
Calvin Johnson Announces Retirement