What happened: The Seattle Seahawks are signing former Dallas Cowboys cornerback Trevon Diggs to a one-year deal. The agreement comes as Terrion Arnold faces an uncertain immediate playing future, with Diggs quickly signing after a summer workout.

Why it matters: Seattle secures veteran insurance to stabilize the secondary ahead of the upcoming regular season. The addition provides immediate depth given the impending absence of Arnold.

What to watch: Diggs will integrate into the defensive scheme as the preseason concludes.