(Undated) -- Oregon State is set to host in-state rival Oregon in a three-game Pac-12 series beginning on Thursday. The Beavers have won two straight to sit at 26-and-6, while the Ducks are 19-and-15. Portland fell 12-2 last night at UNLV. The two teams will square off again this afternoon in Vegas. The Pilots dropped to 13-and-21.