Armbrister played in 73 games during the 1976 season, the most in his career, batting a career-best .295. He laid down a sacrifice bunt in his only plate appearance in that year's National League Championship Series (NLCS), and did not play in the Reds' four-game sweep of the New York Yankees in the World Series. Armbrister played his final major league game on October 2, 1977, at the age of 29. He finished his final season with a .256 batting average with one home run and five RBIs in 65 games. For his career, he batted .245 with 4 home runs and 19 RBIs in 224 games.