Because quotes on a page don't convey tone, it's hard to tell just how serious former NFL quarterback Joe Theismann was when he spoke with Fox Sports' Chris Tomasson about the prospects of LeBron James taking on a football career at some point down the line—and the idea of Theismann becoming James' mentor.

If judged by the detail Theismann used in discussing the topic, it's easy to ascertain that Theismann believes James should consider a run at quarterback in the NFL. Because James is an unreal athlete who actually has a history in football, this isn't completely ridiculous—but don't get me wrong, it's still ridiculous.

James, at 28, has already played nine NBA seasons. Assuming he faces no serious injury, James could conceivably go on to play another six to eight years at a high level. Is that when he should consider an NFL career?

James has watched the NBA greats before him, and he witnessed what Michael Jordan's tour in baseball amounted to. The superhuman Jordan took a swing at baseball in the middle of his Hall of Fame career and realized he was just that—human. He promptly went back to basketball and continued to win NBA titles.

But let's take my opinion out of the equation and read what Theismann had to say:

On when James should consider football

"I would love to work him out and also serve as his agent. I'll go wherever he wants this summer. He could play another four years in the NBA before seriously trying the NFL. ... There are not a lot of 38- or 39-year-old basketball players, but there are 38- and 39-year-old quarterbacks, so there's always time for him."

On how James' basketball skills translate to football

"I wouldn't count him out. He's the most tremendous physical specimen in all of sports. I think he's certainly talented enough. He's intelligent. He's like the quarterback on the Miami Heat, but there are so many things (to being an NFL quarterback).