Ellis was 3 of 7 from the field -- all 3 makes coming from 3-point range -- and knocked down a game-high six free throws.
Army (3-1) took a 31-30 lead into halftime after Kyle Wilson made a layup as time expired in the first half.
The Black Knights opened the second half with eight unanswered points to go ahead 39-30. St. Francis cut the deficit to 45-44 with 10:06 left but Army held the Terriers to just one point over the next six minutes to pull away.
Army outshot St. Francis (1-2) 42.9 percent (24 of 56) to 33.9 percent (20 of 59) and got 35 points off the bench compared to just 10 for the Terriers.
Jalen Cannon led St. Francis with 23 points and 10 rebounds.
New Cowboys coach Brad Underwood has a lot of returning talent to work with, but must improve Oklahoma State's defense to achieve a turnaround.
The family of former Houston Astros owner Roy Hofheinz wants a court to require the University of Houston to keep his name on the school's basketball arena.
Michigan has hired assistant basketball coaches Billy Donlon and Saddi Washington.