Stevan Ridley Injury: Where do the Patriots turn next?

If New England Patriots running back Stevan Ridley's season is over with a torn ACL as is feared, where does the team turn at the running back position? Let's take a look at the options:

Shane Vereen: The Patriots could choose to increase Vereen's workload as a between-the-tackles runner. Vereen has been up-and-down in that kind of role before, but using him in an increased capacity certainly makes some sense.

Brandon Bolden: Bolden received the every-down reps once Ridley went down against the Bills. He isn't a game changer, but he has size and power and is arguably the team's best short yardage back. He also had a stint as the team's 3rd down back when Vereen was injured in 2013.

James White: White has been active for and played in just one game this year (week 4 vs. Kansas City). The 4th round pick has more upside than Bolden, but has yet to prove he can be relied on as a contributor.

Jonas Gray: Gray was a standout player for the Patriots in the preseason, but lost out on a roster spot to Bolden because of his lack on contributions on special teams. With a spot on the depth chart likely to be opened, he's not a bad bet for a practice squad promotion.

BenJarvus Green-Ellis: Green-Ellis is a free agent, and past his prime at age 29. He's battling a hip injury, and several teams have been interested in him once healthy. He knows the Patriots' system, his skillset compliments Vereen well, and he would come at a minimum-level salary.

Other free agent options: Michael Bush, Willis McGahee, Tashard Choice

What are your thoughts? How would you like to see the Patriots handle the running game if Stevan Ridley is done for the year?