(Undated)  --  Oregon State lost 6-5 yesterday to Arizona in Tuscon.  The Beavers lost the series and fell to 7-and-5 in the Pac-12.  Oregon fell 7-0 yesterday to Washington State in Eugene.  The Ducks won the first two games of the Pac-12 weekend series.  Oregon will play Portland tonight in Eugene.   The Pilots were swept by Gonzaga in a three-game WCC weekend series in Spokane.