Preseason game No. 2 for the Dallas Cowboys takes place in Las Vegas, facing off against the Raiders. Another great opportunity to prepare for the 2024 season, a couple of big-time offensive stars will not take the field. Neither quarterback Dak Prescott nor starting right guard Zack Martin are in uniform ahead of Saturday night’s kickoff. Both will watch from the sideline, supporting their teammates. “As expected, Dak Prescott, Zack Martin not in uniform for tonight’s preseason game against the Raiders,” Jon Machota of The Athletic said via X. Usually, we do not see veteran players playing in…