Rivard was 4 of 5 from the field, 3 of 4 from 3-point range and 5 of 5 from the free throw line. Moundou-Missi made all seven of his attempts from the field, including his only 3-point attempt, and his lone free throw on a three-point play gave Harvard a 47-28 lead with 12:07 left in the second half.
Harvard (14-2) shot 64.9 percent (24 of 37) from the field compared to just 30 percent (15 of 50) for George Washington.
Keith Wright, who was perfect from the field (4 of 4), finished with 11 points and eight rebounds for the Crimson.
Tony Taylor led George Washington (6-10) with 13 points but was 3 of 12 from the field and missed all three of his 3-point attempts.
ESPN's Dan Dakich joins The Paul Finebaum Show to discuss the SEC's presence in the NBA Draft.
Ted Kapita was the top-rated recruit from West Virginia in the class of 2015 and recently played at DME Academy in Florida.
With the Suns drafting Tyler Ulis, they now have five guards on their roster who attended Kentucky.