(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.