William Loes (December 13, 1929 – July 15, 2010) was an American right-handed pitcher who spent eleven seasons in Major League Baseball (MLB) with the Brooklyn Dodgers (1950, 1952–56), Baltimore Orioles (1956–59) and San Francisco Giants (1960–61).

He appeared in three World Series with the Dodgers, including the only one won by the franchise when it was based in Brooklyn in 1955.

Among Major League Baseball's video archives is a television broadcast of the sixth game of the 1952 World Series, of which Loes was one of the starting pitchers.

During the game, announcer Red Barber states that Loes was the son of Greek immigrants who had changed his last name.

[2] Then a grounder hit by Yankee pitcher Vic Raschi bounced off his leg for a single, allowing a run to score.