With the signing of Michigan cornerback Jourdan Lewis earlier this week, the Dallas Cowboys now have every rookie under contract. According to OverTheCap.com, The four-year deal is worth a reported $3.15 million (total contract value) with a base salary of $465K this season.
Lewis was selected in third round (pick no. 92 overall) of the 2017 NFL Draft and is the last of nine rookies to sign with Dallas. All eight of his new teammates signed in early May, before the start of rookie minicamp.
It is apparently not unusual for a third round pick to be the last to sign.