The 5-11 rookie free agent from Georgia State joined the Eagles following the draft and opened the 2018 season on the practice squad following the cutdown to 53 players.

Sullivan was promoted to the active roster on October 25 after defensive end Derek Barnett was placed on Injured Reserve. In five games, he recorded 11 tackles and played both in the secondary and in a primary role on special teams. He got the start as an outside cornerback in the Eagles' Week 12 game against the New York Giants. Sullivan was waived on Tuesday.