Belanger took over as the Orioles regular shortstop in late 1967 and held the position for over a decade. His largest contribution to the team was on defense, where he earned a reputation as one of the best fielding shortstops ever. Receiving the AL Gold Glove eight times (1969, 1971, 1973–78), he was also named to the All-Star team in 1976. Belanger joined a select group of shortstop-second baseman combinations who each won Gold Gloves in the same season while playing together: in 1969 and 1971 with Davey Johnson, and again with Bobby Grich each year between 1973 and 1976 inclusive. And with Brooks Robinson winning at third base every year through 1975, the left side of the Orioles' infield was seemingly impenetrable.

This Rawlings official American League baseball was signed in black by Belanger and includes a Great Moments COA.