Marc Colombo, Kyle Kosier don't practice

Offensive linemen Marc Colombo and Kyle Kosier are not participating in today’s practice at TCU’s indoor facility.

The Cowboys are preparing to play the Redskins without their starting right tackle and left guard. Guard Montrae Holland and tackle Alex Barron will start if Colombo and Kosier can’t play Sunday night.

The Cowboys hoped Colombo would be ready to practice this week. He’s recovering from an Aug. 16 arthroscopic surgery to remove five loose particles from his right knee. On the day of the operation, owner/general manager Jerry Jones said he expected Colombo to be sidelined for 10-14 days.

Kosier sprained the MCL in his right knee later that week, an injury expected to sideline him for four to six weeks. Coach Wade Phillips said the Cowboys are optimistic that Kosier will return closer to the short end of that timetable, but it’s unlikely that he’ll be ready to play Sunday night.

Phillips said Monday that he wouldn’t be comfortable with Colombo starting if the tackle isn’t able to practice this week.