MILWAUKEE — This was one sweet homecoming for Elgin Cook. The rest of the Oregon Ducks made themselves at home, too.Cook scored a career-high 23 points and the seventh-seeded Ducks pulled away for an 87-68 victory over No. 10 seed BYU in the NCAA tournament on Thursday.Joseph Young had 19 points for the Ducks (24-9), who had to stage a big comeback to beat the Cougars 100-96 in overtime in December.