Would Calvin Johnson come out of retirement if Super Bowl contender calls?SI senior writer Greg Bishop and NFL writer Doug Farrar discuss whether Calvin Johnson would stay retired if a top-caliber team wanted to sign him.SI Staff|Share on FacebookShare on XAdd us on SI senior writer Greg Bishop and NFL writer Doug Farrar discuss whether Calvin Johnson would stay retired if a top-caliber team wanted to sign him.Published Feb 4, 2016SI STAFFShare on FacebookShare on XHome/NFL