The Cougars (6-4) led 48-47 with 4:43 to play. Motum made two layups and Ladd scored on another and Washington State was up 54-48. Royce Woolridge, who scored 11 points, made five of his six free-throw attempts to wrap up the win. The final score matched Washington State's largest lead.
The Bulldogs trailed most of the first half, but ended it on an 11-5 run to lead 25-24 at the half.
Fresno State shot only 26 percent in the second half and 30 percent for the game. Washington State shot 47.8 percent in the second half and 40 percent overall.
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