Washington, who scored 15 of his points in the first half, shot 8 of 12 from the field while Baron was 7 of 14.
After Washington's jumper put Canisius (1-0) ahead 14-6 with 13:39 left to play in the first half, Boston used a 13-9 run to cut the deficit to 23-19. However, Washington scored seven straight to put the Griffins up 31-19.
Boston attempted to rally in the second half -- scoring as many points over the first seven minutes (28) as they did the entire first half. But after cutting the deficit to 73-70 with 2:54 left to play, the Terriers made just two of their last five shots while the Griffins sank seven free throws in the final minute.
D.J. Irving led Boston (0-2) with 20 points.
Mike Krzyzewski says he has good reason to be excited for next season thanks to a combination of Duke's incoming freshmen and a core of experienced upperclassmen.
Georgia guard Juwan Parker has been awarded a medical redshirt, leaving him with two years of eligibility, after missing the 2015-16 season with a partially torn Achilles tendon.
Forward Trevon Bluiett has withdrawn from consideration from the NBA draft and will return to Xavier for his junior season.