The Dunkel Index, also known as the Dunkel College Football Index, is a sports team rating system and pick service originally developed in 1929 by Richard C. "Dick" Dunkel, Sr. (1906–1975) to mathematically calculate the best college football teams. Dunkel rated college football teams from 1929 until his death in 1975. His ratings are recognized by the National Collegiate Athletic Association (NCAA) in its Football Bowl Subdivision record book. The NCAA describes Dunkel's methodology as a "power index system." Dunkel described his system an index and claimed that "his difference by scores is scientifically produced." It was cited as the first college football ratings system.