Posted by ESPN.com's Tim Graham
An unnamed source familiar with the injury told Rapoport it's "not expected to be long-term," but the Patriots made a roster move apparently in response to Wilfork's condition and a minor shoulder injury to defensive lineman Mike Wright.
The Patriots signed free agent defensive tackle Terdell Sands. The Oakland Raiders made the 6-foot-7, 335-pound behemoth a late cut after five-plus ordinary seasons. The Kansas City Chiefs drafted Sands in the seventh round in 2001. He also played one game for the Green Bay Packers.
Don't expect Sands to supplant any defensive linemen previously on the roster. As AFC West blogger Bill Williamson notes, Sands was a disappointment in Oakland, making only a dozen starts and registering the only four sacks of his career.