AUSTIN, Texas (Sports Network) - Alexander Robinson rushed for 120 yards and two touchdowns on 24 carries as Iowa State posted its first-ever victory over 22nd-ranked Texas, taking a 28-21 decision at Memorial Stadium.
Austen Arnaud threw for a pair of scores despite completing only 11-of-23 passes with an interception for the Cyclones (4-4, 2-2 Big 12), who rebounded in impressive fashion from a 52-0 pasting at Oklahoma last Saturday.
Darius Reynolds and Josh Lenz each caught a touchdown pass for Iowa State, which beat its conference rival for the first time in eight tries.
Garrett Gilbert was 34-of-57 for 344 yards and two touchdowns, but was intercepted three times for the Longhorns (4-3, 2-2), who failed to capitalize on the momentum of a 20-13 victory over Nebraska last week which vaulted the program back into the Top 25.
John Chiles led all receivers with 117 yards with a score on five catches, Malcolm Williams also added a TD reception but Tre' Newton was held to 43 yards on nine carries.
Arnaud was picked off by Keena Robinson near midfield on the first play of the fourth quarter, but on the next down, Gilbert was sacked, fumbled and Jake McDonough recovered for ISU on the Texas 40. Four plays later, Robinson rolled up the middle for a 20-yard score and a 28-6 Iowa State lead with 12:47 remaining.
Texas responded with a swift scoring drive, going 80 yards in six plays as Gilbert found Chiles in the back of the end zone for a 17-yard TD. Gilbert then ran for the two-point conversion and it was 28-14 with 11:16 to go.
Gilbert was intercepted on the Longhorns' next series with 6:46 to play, but rebounded on the following drive as Williams made a leaping nine-yard scoring grab with 3:15 to play for a 28-21 contest.
Iowa State picked up an easy first down following the kick, but was held on a 3rd-and-1 from its own 48 and was forced to punt. Texas got the ball on its own 10 with 1:01 remaining, but four straight incompletions gave possession back to the Cyclones. Arnaud took a knee to run off the remaining seconds.
The lone score of the first quarter came as Arnaud connected with Reynolds for an 18-yard touchdown strike.
Justin Tucker hit a 23-yard field goal less than a minute into the second quarter, after a potential tying touchdown run from Gilbert was overturned by replay, which revealed the quarterback's knee down at the one.
The Cyclones then went up 14-3 as Robinson took a pitch and went around the right side for a one-yard score. The drive was set up by a shanked punt from Texas kicker John Gold and a fair catch by Lenz at the Longhorns' 37.
Tucker missed a 37-yard attempt wide right with 29 seconds left in the half, and Texas failed to reach the end zone with a 3rd-and-goal inside the five on its second series of the third quarter. Tucker was good from 21 yards out, but the Longhorns trailed 14-6 midway through the period.
Iowa State then took the ball 89 yards in nine plays and assumed a 21-6 edge with 2:42 left in the third as Lenz made a leaping grab in the back of the end zone for a 15-yard touchdown.