At the 2004 World Series of Poker, Liebert won a gold bracelet in a $1,500 Limit Texas hold 'em Shootout event. She was one of three women (Cyndy Violette and Annie Duke being the other two) to win an open event in that year's WSOP. Liebert also appeared on and won the series 2005 Poker Royale: Battle of the Sexes. After being eliminated from the World Speed Poker Open in London in September 2005, Kathy provided commentary on the final table alongside Gary Jones. On June 1, 2008, Liebert made the final table of the $10,000 Pot-Limit Hold'em World Championship at the 2008 World Series of Poker and finished in 3rd place, earning $306,064.