Harley Park Parker (June 14, 1872 – March 3, 1941) was a pitcher in Major League Baseball who played from 1893 through 1901 for the Chicago Colts (1893, 1895–1896) and Cincinnati Reds (1901). Listed at 6 ft 2 in (1.88 m), 200 pounds (91 kg), Parker threw and batted right-handed. He was born in Theresa, New York. His younger brother, Jay Parker, also played in the majors. Parker died in Chicago, at the age of 68.