Introduced to the game by a former boyfriend, Tabb started playing pool competitively in 1991 and was selected for the Scottish Ladies' Pool Team in 1992. In 1997 and 1998, the team achieved two consecutive "Grand Slams," accomplished by winning the Nations Cup, European Championships, and World Championships in the same season. Tabb captained the team during both Grand Slam wins, and remained on the team until 2003. Her sister Juliette Tabb also played on the Scottish ladies' team between 1996 and 2008.
As an individual competitor, Tabb won the UK women's singles title in 1997. The following year, she won the European Women's Pool Championship in Gibraltar.