2014 potential breakouts: running backs

Andre Ellington gained 10 or more yards on 24 of his 118 carries last season (20.3 percent). Christian Petersen/Getty Images

The top running back for the Denver Broncos last season was supposed to be hotshot rookie Montee Ball, but instead, forgotten veteran Knowshon Moreno stepped up in August, showed he could block effectively and produced by far the greatest season of his NFL career, thanks in no small part to the presence and ability of quarterback Peyton Manning. Still, it was a major surprise. Moreno was a 14th-round selection in ESPN average live drafts, but he finished a stunning fifth at his position in standard scoring. Moreno, now on the Miami Dolphins and certainly not expected to achieve the same success, was a clear and surprising breakout, seemingly near the end of a disappointing career in his fifth season. Instead, he posted career bests across the board. So, who's next?