Clemens Johann "Steamboat" Dreisewerd (January 24, 1916 – September 11, 2001) was a pitcher in Major League Baseball who played for three different teams between 1944 and 1948. Listed at 6 ft 1.5 in (1.87 m), 195 lb., Dreisewerd batted and threw left-handed. He was born in Old Monroe, Missouri. In 1947, Dreisewerd was sent down to the Red Sox Class Triple-A farm team in Louisville, and led the American Association pitchers with 18 wins and a 2.15 ERA. He divided his playing time with the St. Louis Browns and New York Giants in 1948, his last major league season.