Do you know who the NFL's leading rusher is right now?
No, it's not Adrian Peterson, Chris Johnson, LeSean McCoy, Ray Rice or last year's champion Arian Foster.
It's Coe College and Sioux City Bandits' alum Fred Jackson.
Now there's a long way to go, but if he does finish the season strong and win the rushing title, you'd have to say he'd be one of the most unlikely superstars in NFL history. Where Jackson played his college ball, when he was drafted (actually, he wasn't) and his role prior to taking over the starter's job are all reasons why that is the case.
And for the most part, he shares at least one or all of those traits in common with the rest of this list.
Suffice it to say, that you can't truly be an UNLIKELY superstar if you were a top 10 overall pick in the draft, or were a college stud at an NFL factory, or a $10 million a year free agent.
A quick disclaimer before you start reading: The rankings on this list don't necessarily indicate a player's greatness. And by that I mean, just because Player X is 10th on this list and Player Y is 11th doesn't mean he was a "better" player or had a "greater" career. The higher a player is on this list, the more unlikely his rise to stardom was.