Brandon Paul added 14 points and six assists for the Illini (2-0).
Illinois couldn't shake the Terriers early, but closed the first half on a 15-0 run to take a 45-25 lead. The Illini held St. Francis scoreless for 7:11 during the spurt.
Illinois had only eight turnovers, something that concerned first-year coach John Groce during exhibition play.
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Jalen Rose and David Jacoby announce their choices for sleepers in the 2016 NBA Draft.
Daryl Gross, who spent a decade as Syracuse's athletic director, will start as Division II Cal State-Los Angeles' AD in July.
Utah forward Brekkott Chapman, who averaged 4.4 points and 2.8 rebounds last season, has transferred to Weber State, coach Randy Rahe announced Wednesday.