Constantine Nicholas "Gus" Keriazakos (July 28, 1931 – May 4, 1996) was an American professional baseball player.

He was a 6 ft 3 in (1.91 m), 187 lb (85 kg) right-handed pitcher who worked in 28 games in the Major Leagues in 1950 and 1954–1955 for the Chicago White Sox, Washington Senators and Kansas City Athletics.

A native of West Orange, New Jersey, Keriazakos attended Montclair High School, where he played baseball and basketball, and competed in track.

[1] Keriazakos spent the entire 1954 campaign with Washington, appearing in 22 games, 19 in relief, and posting a creditable earned run average of 3.77.

All told, he appeared in 28 MLB games and allowed 81 hits and 42 bases on balls with 42 strikeouts in 73⅔ innings of work.