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Tim Tebow is leaving the door open in case the NFL comes knocking. USATSI

Tim Tebow has a wacky idea -- nay, a wacky dream. He's holding the door open for an NFL return.

He isn't completely giving up on the NFL, even though the NFL gave up on him, even though he already got his shot with four different teams, even though he can't really throw a football like an NFL quarterback.

Speaking with Larry King, Tebow answered some questions about the potential for a comeback.

King: Do you still hope to play in the NFL?

Tebow: I don't know. I don't know what the future holds, but I know who holds my future. That's a quote I've said since I was probably 18 years old, freshman year in college. And it's one of my favorites, because He's got a better plan than I have for my life and I'm grateful for that.

King: Do you talk to teams?

Tebow: I talk to a lot of my friends, who are in the league and playing, and all around. So, yeah.

King: Might you come back?

Tebow: I don't know. We'll see what doors open. Maybe.

King also asked him about changing positions. You know, because Tebow had some difficulties playing quarterback.

King: Did you ever think of changing positions?

Tebow: I think that's one that's really important is life is that we pursue our passions. You pursue what's on your heart, you pursue what you're passionate about. And for me, the game of football is the position of quarterback. I've loved it since I was little boy, looking up to Danny Wuerffel when he was at the University of Florida.

You don't do things necessarily because other people want you to. You do what's on your heart, what you're passionate about, and that's something that I've really always tried to do.

King: So your passion was greater at quarterback than for football?

Tebow: No question. No question.

King: So if someone said you could've had a 10-year career as a running back, you'd rather have been a quarterback?

Tebow: Of course. You pursue your passion. You pursue what's on your heart -- not to please other people, but to do what you feel like you're called to do. It's not even close.

It's worth remembering, of course, that Tebow did serve as the Jets' punt protector, which didn't always go smoothly. It's also worth remembering that Tebow experienced a successful stint as the Broncos' starter in 2011, when he helped the Broncos earn a playoff berth and a playoff win.

But the idea that Tebow could return to the NFL shouldn't even be an idea. He hasn't thrown a pass in a game since 2012. His career completion percentage sits below 50. His passer rating is 75.3. Bill Belichick, the most innovative coach in the league, couldn't find a spot on the Patriots' roster for Tebow.

It might be time for Tebow to stop holding the door open, because the NFL isn't walking through.