Fuller thought Megatron was joking about retiring
Calvin Johnson: Career retrospective
Lions wide receiver Calvin Johnson retires from NFL
Fantasy impact of Calvin Johnson's retirement
Calvin Johnson - Wikipedia
Calvin Johnson retires as the Lions' all-time leading receiver
Could Calvin Johnson walk away from football? - Pride Of Detroit
Detroit Lions' Calvin Johnson joins this list of star athletes
Lions star WR Calvin Johnson retires after 9 seasons
Ex-Lion Mike Furrey has Calvin Johnson promoting Limestone
Detroit Lions' Calvin Johnson Has Retired