In 1997 with the Yankees, Curtis hit .291 with 12 home runs and 50 runs batted in. In the postseason he went 1-for-6 with 3 walks and 1 strikeout. In 1998, Curtis hit .243 with 10 home runs and 56 runs batted in during the Yankees' 114-win regular season. In the 1998 American League Division Series, Curtis was 2-for-3 with a run scored and a stolen base. In the 1998 AL Championship Series, he was 0-for-4 with a walk and a strikeout. He did not play in the 1998 World Series, but still received a World Series ring.