Which Sophomore NFL Running Backs Will Make the Biggest Leap in 2016?

2015 was a disappointing season for several rookie running backs who didn't quite live up to the hype, but a couple of those backs are primed to take a big step forward in their 2016 sophomore seasons.  

Which five sophomore backs will make the biggest leap in 2016?

Watch Madelyn Burke and Bleacher Report NFL Analyst Chris Simms discuss sophomore running backs in the video above.