Withey's triple-double was only the second Kansas history and his blocked-shot total established a new school record for the Jayhawks (5-1), who continued their momentum after winning the CBE Hall of Fame Classic.
Ben McLemore, Travis Releford and Elijah Johnson each added 13 points for the victors.
San Jose State (2-3) was led by James Kinney with 30 points.
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