Nicholas converted all five of his 3-point attempts and finished with 21 points, while Riley was 4 for 5 and had 17 points for the Pilots (9-16, 2-8 West Coast), who were 11 for 16 as team from beyond the arc and shot 56 percent overall from the field. Both of Portland's conference wins this season have come against Loyola Marymount (8-15, 1-9).
Anthony Ireland scored 21 points for the Lions, who lost despite shooting 47 percent and making 5 of 9 3-point attempts.
Portland led 60-58 with 1:52 remaining but got a 3-pointer from Nicholas that sparked a 9-2 game-ending run.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.
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.