High Quality Content by WIKIPEDIA articles! Morris "Moe" Berg (March 2, 1902 – May 29, 1972) was an American catcher and coach in Major League Baseball who later served as a spy for the Office of Strategic Services during World War II. Although he played 15 seasons in the major leagues, almost entirely for four American League teams, Berg was never more than an average player, usually used as a backup catcher, and was better known for being "the brainiest guy in baseball" than for anything he accomplished in the game. Casey Stengel once described Berg as "the strangest man ever to play baseball".