Cropper competed in three individual events at the 2000 Summer Olympics in Sydney. She qualifies for the Olympic Games with 26.54 (50 m freestyle), 58.44 (100 m freestyle), and 1:02.76 (100 m butterfly) at the Pan American Games in Winnipeg, Manitoba, Canada. On the first day of the Games, Cropper placed fortieth in the 100 m butterfly. Swimming in heat three, she completed the event with a personal best of 1:02.34. Four days later, in the 100 m freestyle, Cropper lowered her lifetime record to 57.91 from heat two, finishing slightly behind leader Leah Martindale of Barbados, a finalist in Atlanta four years earlier. In her third event, 50 m freestyle, Cropper posted a time of 26.36 from heat six for a thirty-second overall seed, but missed the semifinals by just half a second (0.50).