(Corvallis, OR)  --  Oregon State desperately needs a sweep of Arizona on Thursday and Arizona State on Saturday in Corvallis to keep its slim hopes alive for a NCAA tournament bid.  The Beavers are third in the Pac-12 with a 9-and-5 record and 17-and-9 overall.  Arizona State is second in the Pac-12 with a 10-and-5 record and 19-and-8 overall.  Oregon State lost to both Arizona schools on the road in January.