He threw and batted right-handed, and stood 6 feet 2 inches (1.88 m) tall during his active career.

He signed with the Yankees in 1961 and was in his third year in their farm system when he was called to the majors in August 1963.

Mantle belted a two-run home run off Mike McCormick to bring the Yankees to within a run, and three batters later, Tom Tresh hit another two-run blast, giving New York a 5–4 lead.

Hal Reniff the held the Orioles scoreless, registering a save, and preserving Metcalf's only MLB victory.

This biographical article relating to an American baseball pitcher born in the 1940s is a stub.