(Corvallis, OR)  --  Oregon State dumped Washington State, 69-49, in its final game of the season in Corvallis.  Gary Payton the Second went for 13 points seven rebounds and eight assists in his father's retired number-20 on Senior Day.  The Beavers are 17-and-10 and 8-and-8 in the Pac 12.  They close out the regular season at USC on Wednesday and at UCLA on Saturday.