John Michael Joseph Shea (December 27, 1904 – November 30, 1956) was a professional baseball relief pitcher who played one game for the 1928 Boston Red Sox of Major League Baseball (MLB).

Listed at 5 feet 10.5 inches (1.791 m) and 171 pounds (78 kg), he threw and batted left-handed.

[2] Hosting the New York Yankees at Fenway Park, the Red Sox were trailing, 9–3, at the end of the eighth inning in the first game of a doubleheader.

[3] Shea was brought in to pitch the top of the ninth; the first batter that he faced was Lou Gehrig, whom he walked.

[3] Thus, Shea was charged with two earned runs in one inning pitched, for an earned run average of 18.00[2] Shea went on to have a brief minor league career, pitching for the Pittsfield Hillies of the Eastern League in 1928 and 1929.