Cowboys right guard Zack Martin will not return. He entered concussion protocol after a hit late in the first half.
Joe Looney replaced Martin on the final series of the first half.
Martin, center Travis Frederick and left tackle Tyron Smith made the All-Pro team last season. Only Frederick has made it through the season without an injury.
Smith returned Thursday after missing the previous two games with a groin injury. He also has dealt with a back injury.
Smith was called for a holding penalty, negating a 34-yard touchdown run by Dak Prescott in the third quarter.