SAN DIEGO (AP) -- Sean Mannion threw three touchdowns and Oregon State scored three times in the fourth quarter to come from behind and defeat San Diego State 34-30 on Saturday night.
After Mannion hit Terron Ward for a 10-yard score to pull Oregon State within 30-28, cornerback Steven Nelson intercepted Quinn Kaehler's pass and returned it 16 yards to give the Beavers the lead with 2:38 remaining in the game.
Kaehler, who was making his first career start, was intercepted again on the next possession by Ryan Murphy to seal the win for the Beavers. It's their second win in five games against the Aztecs.
Mannion completed 38 of 55 attempts for 367 yards, and the Oregon State rushing game was held to just 2 yards. Ward ran 10 times for 25 yards, but Mannion lost 23 yards on four attempts.
Kaehler completed 16 of 24 passes for 251 yards and two touchdowns.