Harriel added eight rebounds and five assists to his point total.
The Highlanders (1-3) shot nearly 53 percent from the field, making 37 of 70 shots, but Whitman (0-2) hung around thanks to 11 made 3-pointers and the efforts of Ben Eisenhardt who scored 21 points on 7-of-19 shooting while pulling eight rebounds.
Robert Smith was the third player in double figures for UC Riverside with 17 points on 7-of-11 shooting including 3 for 6 from behind the arc. Lucas Devenny scored only three points but had 15 rebounds for the Highlanders.
UC Riverside dominated the paint, outscoring the Missionaries 40-24 and was stellar in the open court, outscoring Whitman 20-5 on fast-break points.
Guard Naz Mitrou-Long, whose 2015-16 season ended in December due to hip problems, has been granted a hardship waiver for the coming season, Iowa State said.
As the Sooners look to life without superstar Buddy Hield and his sidekicks, it's clear their unseasoned players will need to grow up fast.
The Central Intercollegiate Athletic Association says it won't move its headquarters, its basketball tournament or other conference championships from North Carolina, despite