What happened: The Seattle Seahawks are signing free-agent cornerback Trevon Diggs to a one-year contract, per Adam Schefter. The former Dallas Cowboys defensive back joins his new club during the preseason.

Why it matters: Diggs brings veteran experience to the Seattle secondary as he attempts an NFL comeback. The move follows his offseason auditions, including a recent workout with the Detroit Lions.

What to watch: Diggs will integrate into the Seahawks' defense for the remainder of their preseason schedule.