In the 2012 NLCS, Belt hit .304 (7-for-23) in six games with a .565 slugging percentage. On October 28, 2012, Belt won his first World Series ring when the Giants swept the Detroit Tigers. Belt played a key part of the Giants' clinching game in the World Series, starting the scoring by hitting a triple to right field in the second inning, scoring Hunter Pence from second.