Montgomery (leg) didn't practice Tuesday, Zack Cox of NESN.com reports.
With Montgomery continuing to miss practice, the versatile back isn't likely to suit up for the Patriots' preseason opener Thursday against the Texans. Once he's able to rejoin practice, he'll look to carve out a change-of-pace role in a backfield led by Rhamondre Stevenson, fighting for backup snaps with second-year pros Pierre Strong and Kevin Harris.