Connor Halliday threw 25 yards to Isiah Myers for a tie-breaking touchdown with 2:15 to play to give Washington State a 24-17 upset over Arizona on Saturday.
Halliday completed 39 of 53 passes for 319 yards and two scores, the junior's seventh 300-yard passing of the season.
Ka'Deem Carey scored both touchdowns for Arizona (6-4, 3-4 Pac-12) on a 30-yard run and a 7-yard reception from B.J. Denker. Carey gained 132 yards in 26 carries.
On the final play of the game, from the Washington State 13, Denker's pass to Samajie Grant in the end zone was caught well out of bounds.
Washington State (5-5, 3-4) had lost its previous three games by a combined score of 162-83.