The Golden Griffins (5-1), who finished 5-25 last season, have already matched that victory total in their first season for coach Jim Baron.
Billy Baron, the coach's son, made 5 of 7 shots in the first half and had 12 of his points as Canisius took a 36-30 lead at the break. He transferred from Rhode Island after last season when his father left there to take the Canisius job.
Washington scored 14 of his points in the second half. Jordan Heath scored 10 points and blocked four shots for the Golden Griffins before fouling out.
Derek Needham, with 11 points, was the only player in double figures for the Stags (4-5), who had won their last nine games against Canisius.
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.