Willoughby is a three-time AVCA All-American and ranks second nationally in kills per game in 2003 with 6.59. She added 2.99 digs and 0.62 aces per game while hitting a hefty .372 in her final collegiate season. Willoughby helped the Rainbow Wahine (36-2) to the NCAA Division I Women's Volleyball Tournament semifinals for the second straight year. During the NCAA Tournament, she averaged in excess of 7.5 kills per game and was credited with 35 kills in the NCAA Region Final match versus Georgia Tech. Willoughby produced 17 double-doubles on the season with at least 20 kills in 20 matches.
Willoughby set the school record for career kills on Aug. 22 and has pushed her kill total to 2,598 for sixth best in NCAA Division I history. She averaged 5.91 kills per game during the course of her career, which ranks third in NCAA history. Willoughby also contributed 1,440 digs, 194 service aces and 291 blocks over 459 career games with the Rainbow Wahine.