McDermott grabbed nine rebounds and Greg Echenique added 16 points and nine boards for the Bluejays (14-1, 3-0 MVC).
Austin Chatman helped out with 13 points and nine assists for Creighton.
The Sycamores (9-5, 2-1) got 13 points apiece from Manny Arop and Jake Odum, and Justin Gant scored 12.
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