Spencer Petras threw three touchdown passes and No. 24 Iowa scored 35 straight points after trailing by two touchdowns early to beat Illinois 35-21 on Saturday.

Petras was 18 of 28 for 220 yards for Iowa (5-2) and Tyler Goodson had 19 rushes for 92 yards.

Brandon Peters started 8 for 8 for 101 yards and two touchdowns for Illinois (2-4), but went 2 for 10 for 15 yards before being pulled for backup Isaiah Williams midway through the fourth quarter. Williams was 7 of 16 for 83 yards and a touchdown.

Iowa's comeback started with a 22-yard pass from Petras to Sam LaPorta to cut the Illini lead to 14-7. It was the sophomore’s first career touchdown catch. Duncan Keith added two field goals to cut the Illinois lead to 14-13 at the half.