(Corvallis, OR) -- Oregon State opened up a 15-point lead by halftime as it rolled the Ducks, 70-57 last night at Gill Coliseum. In the Pac-12 opener for both teams, the Beavers prevailed behind 19 points for Tres Tinkle. The 10-and-2 Beavers host Stanford on Wednesday. Chris Boucher led the Ducks with 16 points as they fell to 11-and-3. They'll host Cal on Wednesday.