Phil Parker is in his 24th season on the Iowa coaching staff. He is in his 11th season as defensive coordinator. During that time Iowa’s defense has annually ranked among the national leaders. In 2022, Iowa defense ranks first in the nation in yards allowed per play (3.85), third in total defense (264.4), fourth in defensive touchdowns (3), fifth in scoring defense (14.3), fifth in team pass efficiency defense (106.14), eighth in rushing defense (92.8) and 10th in passing yards allowed (171.7).
Iowa’s defense has allowed three or fewer points in three games and 13 or less in seven of nine games, holding all nine opponents under their season total offense average and eight of nine under their season scoring average. Five of nine opponents have gained less than 200 yards total offense. Six of nine opponents have rushed for less than 100 yards.
With Phil Parker on staff, Iowa won Big Ten titles in 2002 and 2004 and West Division titles in 2015 and 2021. Since 2017 the Iowa defense leads the nation in interceptions, including a school-record 25 in 2021. With Phil Parker on staff, Iowa has won nine bowl games since 2021, second most in the Big Ten. in 2021, Iowa’s defense ranked in the top 20 nationally in interceptions (first), turnovers gained (third), defensive touchdowns (seventh), turnover margin (11th), pass efficiency defense (sixth), rushing defense (13th), scoring defense (13th) and total defense (20th),