William Patrick Purtell (January 6, 1886 – March 17, 1962) was an American baseball infielder. He played professional baseball for 19 seasons between 1904 and 1928, including five seasons in Major League Baseball with the Chicago White Sox from 1908 to 1910, Boston Red Sox from 1910 to 1911, and Detroit Tigers in 1914. Purtell compiled a .227 batting average in 335 major league games.