PULLMAN, Wash. (AP) — Steven Long scored on a 1-yard run with just over 2 minutes left in the game to lift Portland State to a 24-17 upset of Washington State Saturday in a steady rain storm that hampered the Cougars' passing offense.

The rain and unseasonably chilly temperatures stymied Washington State quarterback Luke Falk, who this year replaced national passing leader Connor Halliday.

Portland State, a member of the FCS Big Sky Conference, was playing its first game under coach Bruce Barnum, who was making his college head-coaching debut. Barnum is working under a one-year contract.

It was the first time Portland State beat a Pacific-12 team in 15 tries, and lifted their record to 3-32 against FBS teams. It was Washington State's first loss to an FCS team in 20 outings.

Portland State quarterback Alex Kuresa completed just 7 of 12 passes for 61 yards in the opener for both teams.