Dak Prescott is not slated to play in Saturday's preseason matchup versus Seattle, keeping the Cowboys' first team on the sideline for the opener while Brian Schottenheimer turns the game into an evaluation of the backs behind Javonte Williams. Jaydon Blue, who is already listed as the No. 2 RB, is in line for a bigger sample as the club sorts out a backup role that remains open.
Schottenheimer said in early August that the team's starters would not play during the preseason, and he repeated Thursday that Phil Mafah and Blue will both get a ton of work. He also described the pair as being in a heated battle for the top backup spot, a sign that the opener is less about the scoreboard than about getting a clean read on who can handle live snaps when the games count.
That is the immediate reason Blue matters now. He is searching for footing behind Williams at the same time Prescott is being held out, which leaves the running back rotation as one of the few parts of Saturday's game with real stakes. The Cowboys have made that choice even as CeeDee Lamb said he and Prescott are hitting on all cylinders at training camp, a reminder that the offense can look sharp in practice while the team still declines to test its starters in public.
There is a second layer to the night as well. The preseason opener is already being used to sort roles, and it is being complicated by injuries elsewhere, with Valdes-Scantling headed for an MRI to evaluate his issue. That only sharpens the need for Blue and Mafah to use the extra work, because the team is not just protecting veterans; it is also trying to learn what it has behind them before the depth chart hardens.
What happens next is simple enough: Blue and Mafah should get the clearest preseason audition either back has had so far, while Prescott stays out and the Cowboys keep their focus on evaluation rather than a full dress rehearsal. For Blue, the question is no longer whether he is in the mix. It is whether Saturday gives him enough snaps to move from No. 2 RB to something more secure.
