Montgomery was a limited practice participant Wednesday due to a knee injury, Zack Cox of NESN.com reports.
As Cox notes, Montgomery left New England's preseason finale with an ankle issue, but Wednesday's practice report lists him with a different injury. Either way, if Montgomery is available this weekend against the Dolphins, he's a candidate to help fill the change-of-pace/pass-catching void created by the retirement of James White. If Montgomery is out or limited, however, rookie Pierre Strong could see added touches behind top early-down options Damien Harris and Rhamondre Stevenson.