In a thirteen-year major league career, Triandos played in 1,206 games, accumulating 954 hits in 3,907 at bats for a .244 career batting average along with 167 home runs, 608 runs batted in and a .322 on-base percentage. He ended his career with a .987 fielding percentage in 992 games as a catcher and, a .988 fielding percentage in 168 games as a first baseman. Triandos led American League catchers twice in assists and in baserunners caught stealing. In 1957, he threw out 66.7% of the base runners trying to steal a base, the third highest single-season ratio in Major League history. Over his career, Triandos threw out 46.62% of the base runners who tried to steal a base on him, ranking him 6th on the all-time list.

This 1959 Home Run Derby Gus Triandos card was graded a 4 and encapsulated by PSA.