In their third consecutive Aztec Cup semifinal appearance, Arizona faced off against National contenders UC Santa Barbara in a repeat of a group stage fixture the previous year.
Arizona compiled 50% possession taking 11 shots (5 on target) and scoring once.
Jeremy Siwik forced a turnover in midfield and played it in to Carter Fung who beat two defenders, brought the ball onto his left foot, and then slotted it home into the bottom right corner.
UCSB equalized 10 minutes later with a well-taken free kick 20 yards from goal.
Chase Van Bibber made one save in regulation time.
Arizona lost 4-3 on penalties and finished the highest scoring team of the tournament as well as the second Arizona team to ever go undefeated in Aztec Cup group play.