The top-ranked Colorado State-Pueblo Thunderwolves were upset on Saturday in the quarterfinals of the Division II playoffs, losing 34-13 to the West Texas A&M Buffaloes. West Texas avenged a season-opening 44-34 loss to the Thunderwolves on Aug. 30. It is the second consecutive week that the Buffaloes have knocked off an undefeated and top-five team.

West Texas was led by quarterback Dustin Vaughan, who passed for 324 yards and three touchdowns, with one interception. Buffaloes running back Khiry Robinson gained 181 yards on the ground, adding two grabs for 14 yards and a score.

Colorado State-Pueblo's normally potent rushing attack was held to just 32 yards, 233 yards less than in the season-opening matchup between the two teams. Thunderwolves quarterback Ross Dausin was never comfortable in the pocket on Saturday, getting sacked seven times by the West Texas defense.

The Buffaloes move on to face No. 1 seed Winston-Salem, who took down No 3. seed Indiana (Pa.) 21-17. On the other side of the bracket, Valdosta State and Minnesota State-Mankato will square off as both won their quarterfinal contests on Saturday.