The team officially announced Perez’s signing and Fales’s release on Tuesday morning.
Fales signed with the Lions in June and appeared in Detroit’s three preseason games this summer. He was 20-of-41 for 310 yards, a touchdown and an interception in those outings.
Fales entered the league as a Bears sixth-round pick in 2014 and appeared in one regular season game for Chicago. He played two games for the Dolphins in 2017 and spent all of last season as the third-stringer in Miami.