PORTLAND, Ore. -- Lavell Ika scored the go-ahead touchdown with 1:35 remaining, and Southern Utah's defense stopped Portland State at the 1-yard line on the final play to hold on for a 49-42 victory on Saturday night.
Brad Sorensen threw for 311 yards and four touchdowns as the Thunderbirds (2-2, 1-0) won their first-ever Big Sky conference game. They outscored the Vikings 14-0 in the fourth quarter and never led before Ika's TD, a 1-yard rush.
Portland State (1-3, 1-1) furiously drove 66 yards in to face first and goal at the 2, but Kiernan McDonagh threw two incompletions before being stopped on a quarterback sneak.
McDonagh threw for 270 yards and a touchdown. The Vikings had 317 rushing yards.
Mitch Jessop caught nine passes for 159 yards and two touchdowns for the Thunderbirds. His 39-yard TD reception in the fourth quarter tied the game at 42-42.
Ohio State remained No. 1 in the AP Top 25 and tied a poll record Sunday despite lagging support from voters. Meanwhile, No. 2 TCU and No. 3 Baylor edged forward and No. 4 Michigan State slipped.
Texas cornerback Kris Boyd has apologized for retweeting a Texas A&M fan during halftime of Texas' 50-7 loss to TCU on Saturday.
The Big 12 on Sunday acknowledged an officiating mistake that incorrectly awarded Oklahoma State a first down Saturday and said the officials involved would be disciplined.
Will Grier threw four touchdown passes to four receivers -- all in the first half -- and No. 25 Florida downed third-ranked Mississippi 38-10 on Saturday night.
Leonard Fournette highlighted his SEC-record third straight 200-yard game with a 75-yard touchdown run, and No. 9 LSU overcame Eastern Michigan 44-22 on Saturday night.
Texas A&M receiver Ricky Seals-Jones, who was ejected for targeting midway in the second quarter of Saturday's game, took to Twitter late in the game, retweeting a tweet that questioned the call.