Larsen grabbed six rebounds for the Colonials (6-1), who recovered from a loss to Marquette Friday in the Fullerton, Calif., tournament.
Joe McDonald supplied 12 points with five assists and Isaiah Armwood also put in 12 points.
The Bluejays (5-2) dropped a second straight at the event following five straight wins beginning the season.
Ethan Wragge paced Creighton with 16 points and nine rebounds.
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