Ralph Vacchiano discusses the Giants' backfield:
Rashad Jennings, who I like a lot more than most fans (and media) seem to like, will be the likely workhorse and get the majority of carries. (By the way, hard as it is to believe, he got 48.3% of the carries last year, though I'd expect that to tick up.) Shane Vereen will again be the third-down back and primary receiver-out-of-the-backfield weapon. Maybe they get a little more creative with him. Maybe he just plays better. But I see him being more of a factor.
And then? Good question. I don't think Paul Perkins, their fifth-round pick, will have much of an impact in the offense this year. I think Andre Williams will likely get the first shot to be the short-yardage back, and the guy who spells Jennings for a series or two. How long that lasts depends on him. And I think Orleans Darkwa and Bobby Rainey have an uphill battle to make the roster.
Vacchiano also mentioned that the RB breakdown may depend on which coach came up with the "stupid" four-running back rotation the team used last year. If it was the now-departed Tom Coughlin, then the Giants will primarily use two or three running backs. If it was former OC/new HC Ben McAdoo, then all bets are off.