Grant Hedrick threw for a career-high 410 yards and had four touchdowns passes in Boise State's 55-30 victory over BYU on Friday night.
Hedrick was 24 of 31 with one interception and also ran for a touchdown in the Broncos' highest-scoring game of the season.
Boise State (6-2) had the highest points total against BYU since Tulsa handed the Cougars a 55-47 loss in 2003. BYU (4-4) has lost four straight for the first time since 2010.
Jay Ajayi ran for 118 yards and two touchdowns. He's the first rusher to top 100 yards this season against the Cougars, who entered the game holding opponents to an average of 97 yards rushing. The Broncos finished with 227 yards rushing.