In the 1995 American League Division Series (ALDS) against the New York Yankees, Martínez hit .571 and was on base 18 times in five games. In Game 4 of that series, he hit a three-run home run, then a grand slam home run that broke a 6–6 tie, en route to an 11–8 victory. His seven runs batted in (RBIs) in that game tied a single-game postseason record. The win knotted the best-of-five series at two games apiece and forced Game 5. Down 5–4 in the 11th inning of that decisive game, Martínez hit a two-run double off Jack McDowell, winning the game for the Mariners, 6–5, and series, 3–2. The win sent the Mariners to the American League Championship Series for the first time in franchise history, against the Cleveland Indians, a series they would eventually lose in six games.