 While at UMD, Guidinger's per game average was 15.5 points, 8.7 rebounds and 2.0 assists.Guidinger was a three-time NAIA Men's Basketball Championships All-American center (first team in 1990-91 and 1989–90 and third team in 1988-89), and became the first individual to be named Northern Sun Intercollegiate Conference (NSIC) Player of the Year in three straight seasons.In 2001, Guidinger was inducted into the University of Minnesota Duluth Athletic Hall of Fame.