Thomas Clark "Parson" Nicholson (April 14, 1863 – February 28, 1917) was an American baseball player whose career spanned from 1887 to 1899. He played principally as a second baseman and in the minor leagues. He did play three seasons in Major League Baseball for the Detroit Wolverines in 1888, the Toledo Maumees in 1890, and the Washington Senators in 1895.