An MRI confirmed those fears.
Ridley is New England's lone established power back, capable of churning out tough yards between the tackles while keeping the chains moving. The options to replace his production include passing-down specialist Shane Vereen, special teamer Brandon Bolden, rookie hype bunnyJames White and practice squad member Jonas Gray.
Of that foursome, Bolden and Gray are the ones that fit Ridley's profile as an inside pounder. Bolden has averaged 4.5 yards on 126 regular-season carries. Former Notre Dame star Gray averaged 3.8 yards on 37 preseason carries this past summer.
As is always the case with Bill Belichick's squad, playing time will be doled out via personnel sets dictated by matchups, momentum and game situation.