The Texans had running back David Montgomery back on the practice field on Thursday, but they were missing a couple of other key offensive players.

Montgomery has been out with a groin injury since Week 5 and he was listed as a limited participant in his return. Montgomery’s backfield mate Woody Marks sat out of practice with a knee injury after being a limited participant on Wednesday.

Wide receiver Marvin Harrison Jr. was also downgraded from limited to out on the second injury report of the week. He has a hamstring injury.

Defensive ends Will Anderson (ankle) and Danielle Hunter (hamstring) were added to the report as limited participants. Linebacker Azeez Al-Shaair (groin, personal) and left guard Keylan Rutledge (neck, shoulder) missed practice for the second straight day.

Safety Reed Blankenship (concussion, hand), wide receiver Tank Dell (hand, shoulder), linebacker Jake Hummel (groin), cornerback Jaylin Smith (hamstring), and guard Wyatt Teller (illness) were all upgraded from limited to full participation. Right tackle Trent Brown (wrist), offensive lineman Blake Fisher (thumb), and defensive lineman Tommy Togiai (elbow, shoulder) were also full participants.