What happened: Parker's versatility prompted the assessment, "What can he not do?" Dallas hired him Jan. 22 to lead its defense in 2026.
Why it matters: This is Parker's first NFL coordinator job, with Dallas installing a multiple defense built from a 3-4 base. The approach makes versatility central to preseason role decisions.
By the numbers: Parker has 13 years of coaching experience, including seven NFL seasons working with defensive backs.
What to watch: Preseason work will show how Parker deploys personnel across his multiple fronts.