Caesar and Tim Fuller scored 10 points each for Utah Valley (9-3).
Terrell Brown Jr. had 23 points, six rebounds and three steals for Washington (5-5). Emmitt Matthews Jr. added 10 points.
Washington scored first and did not lead again until Brown hit a jumper for a 24-23 lead near the 3-minute mark of the first half. Washington's last — and biggest — lead was two points, on a free throw by Emmitt Matthews Jr. for a 25-23 lead. Utah Valley took the lead for good with a 7-2 run to close the first half, then scored the first five points of the second half.