Montgomery (ankle/knee) was a non-participant in Thursday's practice.
Sidelined for the second practice in a row, Montgomery is looking uncertain to play in Sunday's game against the Giants while he manages the two lower-body injuries. Unless Montgomery is able to get in some on-field work Friday, he'll likely sit out the Week 4 contest, which would pave the way for Khalil Herbert to take on a workhorse role out of the Chicago backfield.