In his first game for the Iron on February 10, 2019, against the Memphis Express, Perez threw for 252 yards on 19 of 33 passing, leading the team to a shutout victory of 26–0. He finished the season with 1,460 passing yards, 5 touchdowns and 6 interceptions. Perez led Birmingham to a 5–3 record so Birmingham clinched a playoff berth two weeks before the end of the regular season. However the AAF suspended football operations after the eighth week.
