(Eugene, OR)  --  Payton Pritchard posted 20 points as 13th-ranked Oregon crushed Cal 90-56 in Eugene.  Anthony Mathis added 17 points for the Ducks, who improved to 23-and-7.  Oregon can clinch at least a share of the Pac-12 title with a win over Stanford tomorrow at home.  They'll win the title outright if USC beats UCLA tomorrow.