Ryan pitched well for the Mets in the 1969 postseason. Against the Atlanta Braves in the NLCS, Ryan completed a Mets sweep by throwing seven innings of relief in Game 3, getting his first playoff win (it took him 12 years to get another). Then in the 1969 World Series, Ryan saved Game 3, pitching shutout innings against the Baltimore Orioles. The Game 3 victory gave the Mets a 2–1 lead in the Series, which they went on to win in five games. It was Ryan's only World Series appearance in his career.