Strong (undisclosed) didn't practice Thursday, Andrew Callahan of the Boston Herald reports.
Ty Montgomery (leg) also continued to miss practice Thursday, which likely means the duo won't suit up for Saturday's preseason game against the Packers. Once Strong is back on the practice field, he'll look to secure a change-of-pace role in a New England backfield that is slated to be led by the one-two punch of Rhamondre Stevenson and newcomer Ezekiel Elliott.