Young had a 3-pointer with 1:22 left for a 74-70 lead and two free throws with 25 seconds left to cap the scoring for UC Irvine (11-8, 4-1 Big West).
Hawaii (14-7, 2-3) scored 11 straight to close within 63-61 with 6:33 left. UCI's Dominique Dunning stopped the run with a 3-pointer, but the Rainbow Warriors continued to threaten until Stefan Jankovic's missed 3-point attempt with 33 seconds left.
Isaac Fleming scored 14 and Garrett Nevels 13. Hawaii's leading scorer, Aaron Valdes (15.8 points per game), struggled with only six points, but his first field goal was a 3-pointer with 1:40 left to get Hawaii within 71-70.