EUGENE, Ore. — Quincy Guerrier scored 16 points and Nate Bittle had a double-double and Oregon beat Colorado 75-69 on Thursday. But the Ducks went scoreless for nearly the next four minutes, Colorado went on a 9-0 run and drew within 57-55 on a Nique Clifford 3. Rivaldo Soares made two foul shots to start a 6-0 Oregon run, the …