Frederick Albert Antony Klages (October 31, 1943 – March 30, 2023) was an American professional baseball right-handed pitcher, who played in Major League Baseball (MLB) for the Chicago White Sox (1966–67), where he appeared in 14 games (12 as a starter). During his playing days, Klages stood 6 feet 2 inches (1.88 m), weighing 185 pounds (84 kg). He played in 14 games.
Klages died on March 30, 2023, at the age of 79.