Harry William "Hal" Krause (July 12, 1888 – October 23, 1940) was a Major League Baseball player. He was a pitcher over parts of five seasons (1908–1912) with the Philadelphia Athletics and Cleveland Naps. He led the American League in earned run average in 1909 while playing for Philadelphia. For his career, he compiled a 36–26 record, with a 2.50 ERA and 289 strikeouts.