Rajsich closed out the season with four straight wins: in Tempe, York, Pennsylvania, Miami, and New Orleans. She ended the season #1 for the third straight year. At the 2008 US Championships, Rajsich was runner up at National Doubles, where she played with Janel Tisinger, and they lost the final to Jackie Paraiso and Aimee Ruiz. At US National Singles that year, Rajsich came in seeded #1 due to her win the previous year, but she was upset in the semi-finals by Kristen Bellows. Rajsich won her first Women's Singles World Championships at the 2008 International Racquetball Federation (IRF) World Championships in Kingscourt, Ireland, defeating fellow American Cheryl Gudinas in the final. In 2008-09 pro season, Rajsich won four times: Fayetteville, North Carolina, Tijuana, Arlington, Virginia and York, Pennsylvania, But her most remarkable result that season came at the 2008 US Open, where she was upset by 8th seed Brenda Kyzer in the quarterfinals, which was a surprise result given Rajsich was defending champion and had won two of the three pro events before the US Open. The upset opened the door for Paola Longoria to win her first US Open, as Longoria defeated Kyzer in the semi-finals en route to the win. That loss combined with Longoria's good performances that season led to Rajsich finishing 2nd in the rankings to Longoria. Rajsich again played doubles with Janel Tisinger at the 2009 USA Racquetball National Doubles Championships, and were beaten in the final by Jackie Paraiso and Aimee Ruiz, 15–11, 15–13. At USA Racquetball National Singles, Rajsich lost in the semi-finals to Ruiz, 15–14, 10–15, 11–2, who went on to win that year. Rajsich played two international events in 2009 representing the US in Women's Singles both times. She lost in the Round of 16 to Longoria at the 2009 Pan American Championships. Then at the 2009 World Games in Taiwan, Rajsich reached the final, but again lost to Longoria. Rajsich won just twice in the 2009-10 pro season, which was her lowest total since 2005–06. Those events were the first two of the season: the Texas Open in Dallas, and the 2009 US Open.