(Eugene, OR)  --  Tyler Dorsey hit six threes en route to 23 points as Oregon blew out fifth-ranked Arizona 85-58 Saturday in Eugene.  The 13th-ranked Ducks led 38-18 at the half and cruised from there.  Oregon is 21-and-3 overall and 10-and-1 in the Pac-12.  The Ducks play Thursday at eighth-ranked UCLA.