The NFL has experienced something of a resurgence at the running back position in recent years. Adrian Peterson of the Minnesota Vikings remains the gold standard, but there are challengers to his throne in players like Pittsburgh's Le'Veon Bell and Todd Gurley of the Los Angeles Rams.
Another may well be entering the league this year in top-five pick Ezekiel Elliott of the Dallas Cowboys.
However, by the time the dust settles on the 2016 campaign, there's going to be a new king of the mountain—a second-year pro who wasn't even the starter for his team for much of his rookie year.