Dalton Nixon added 14 points for the Cougars (22-8, 11-6 West Coast Conference) and Childs had 13 rebounds for his 14th double-double. The third-place Cougars close the regular season at home on Saturday against league-leader and No. 6 ranked Gonzaga.
Marcus Shaver Jr. scored 21 points for the Pilots (10-20, 4-13), who dropped their fifth straight.
Childs had six points as the Cougars scored eight straight points and Bryant had a 3-point play to end what turned into a 13-2 run for a 24-13 lead midway through the first half. Childs had 15 points as the Cougars led 42-28 at the break.
Portland scored nine straight to get within nine with 12:07 to go but got no closer. A Shaver trey at the 5:21 mark was the last time the Pilots trailed by single digits.
While Kentucky Wildcats coach John Calipari has said players should be able to skip college for the NBA, he told ESPN those going to the G League should be guaranteed eight semesters of college if they don't make it to the NBA.
Mark Few is counting on Gonzaga's rough nonconference schedule to earn the Zags a No. 1 seed. What other teams are scheduling for March?
Jones is a rim protector who will develop under Shaka Smart and the Longhorns.