Lions' Stafford: Calvin Johnson 'serious' about considering retirement

There's a very real possibility Detroit Lions wide receiver Calvin Johnson could call it a career this offseason, according to his quarterback.

"I think, anytime Calvin says something, it's not for show, it's something serious," Matthew Stafford said on "The Mitch Albom Show" on WJR-AM this week, per the Detroit Free Press. "I think you guys have covered him long enough to know that he's a pretty measured person, and everything that he says to the public is a thought-out thing. So in that regard, I'm sure it's thought-out."

Johnson, who's dealt with a number of injuries in recent years, released a statement earlier this month saying he was "evaluating options for my future" and should have a decision soon.

Stafford said he and Johnson have spoken since the end of the season, but declined to disclose details of the conversation.

"I think, really, everything he wanted to say - and I don't want to elaborate on anything - was what he put out in that statement, that he's considering all his options at this point, honestly," Stafford said. "I'm not in the business of speaking for anything.

"He's a heck of a player. We'll see where his head is at and what he's thinking."

Johnson finished the 2015 season with 88 receptions for 1,214 yards and nine touchdowns.