In the National League Division Series against the Colorado Rockies, Lidge appeared in Games 3 and 4 in save situations, earning the save in both games. In Game 1 of the 2009 National League Championship Series, Lidge secured his 3rd save helping the Phillies win 8–6. In Game 4 of the series, Lidge pitched in relief of Scott Eyre to retire the last two batters with the Phillies trailing 4–3 in the ninth inning. He eventually got his first win of 2009 after Jimmy Rollins hit a game-winning double to give the Phillies a 5–4 victory. Entering the 2009 World Series, Lidge and the New York Yankees' Mariano Rivera were the only closers who had not blown a save during the 2009 postseason. In Game 4 which would be Lidge's only appearance in that World Series, he gave up three runs in the ninth inning, giving the Yankees a 7–4 win and a 3-1 lead in the series. The Yankees went on to win the series in six games.