Calvin Johnson, also known as MegaTron, retired from the NFL and the Detroit Lions at the end of last season.  The main reason for his leaving at the age of 30 was concerns about his health.

In a Video teaser that was on ESPN,com, Johnson told interviewer Michael Smith some pretty revealing things.  The upcoming 'E:60 special has Johnson telling Smith that yes health concerns did weigh very heavily in his decision not to return to football, but also said the the Lions had something to do with his decision as well.

Calvin Johnson said that if the Lions would have been a contender, it would have been harder for him to let go, and that the Lions inability to contend for championships factor

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in his decision for early retirement.

The show E:60 airs tonight at 10pm on ESPN.