Crippen earned a spot on the 2000 Olympic Team by placing second in the 400-meter individual medley at the U.S. Olympic Trials. In the 2000 Summer Olympics, she placed sixth in the event. Following her Olympic showing, Crippen competed at the 2002 Pan Pacific Championships and 2003 World Championships in Barcelona, Spain. Crippen is a three-time U.S. national champion, winning two national titles in the 400-meter individual medley and one in the 200-meter breaststroke.