Oregon State didn't lose its groove with quarterback Sean Mannion out with a knee injury.
Vaz completed 20 of 32 passes for 332 yards with three touchdowns and no interceptions. His go-to receiver was Brandin Cooks, who overcame an early ankle injury to catch eight passes for 173 yards.
BYU entered the game ranked No. 3 in scoring defense (8.8 points per game), No. 5 in total defense (229.3 yards per game) and No. 1 in rushing defense (59.5 yards per game). The Beavers gained 450 yards and rushed for 118.
Meanwhile, the Oregon State defense gave up some yards -- 386 -- but it grabbed three interceptions, including Jordan Poyer's pick-six that iced the game in the fourth.
Oregon State is 5-0 for the first time since... 1939. Yeah, it's been a while.
The Beavers will host Utah next weekend.