Lamar never trailed and was up 29-10 at the midway point of the first half and had a 58-30 advantage at the break.
The Cardinals scored 54 points in the paint, had 24 points off fast breaks, and finished with 29 points off turnovers.
Lamar shot 32-of-78 from the field while limiting Austin to just 16-of-65 shooting. Lamar dominated on the boards 71-41.
Austin Freet led Austin College with 10 points. Cedric Hudson chipped in 8 points and had two blocks and one steal.