(Corvallis, OR)  --  Oregon State will face another stiff challenge Saturday when it plays at USC.  Kickoff is 1 p.m.  The Trojans are ranked number-15, but dropped 10 spots after losing last weekend to Washington State.  It will be the third straight week the Beavers have played a ranked team.  OSU is 1-4 and 0-2 in the Pac 12.