A poker player since the age of five, Rousso began serious poker tournament play during her summer break from law school. In her first year of playing, Rousso has multiple in the money tournament finishes, including seventh place at the 2006 World Poker Tour championship event and eighth place in the 2006 World Series of Poker $5000 no limit hold 'em event. In September 2006 she won $285,450 at the $5000 no limit hold 'em event at the Borgata Open. As of 2007, her tournament winnings exceed $740,000.