To give your skill players a better chance of producing and succeeding on every play, NFL teams need to have strong foundations in the trenches. Looking back at the 2017 season, the two areas that were of the most concern were the left guard position and the defensive tackle position, in particular the 1-techn role. Last year, those positions were respectively manned by Jonathan Cooper and Maliek Collins.
Dallas re-signed Joe Looney and signed Cameron Fleming and Marcus Martin in free agency. They may not be completely done with upgrades across the offensive line, but it is clear that the spot where the Cowboys are hurting the most comes at the defensive tackle position.