James Harry Colliflower (March 11, 1869 – August 12, 1961), nicknamed "Collie", was a Major League Baseball player during the 1899 season. As a 30-year-old rookie southpaw pitcher for the Cleveland Spiders, Colliflower won his debut game on July 21 giving up only 3 runs on 6 hits in a 5–3 victory against his hometown Washington Senators in the first half of a double header.