In 1951 Russ Catlin officially revised AAA records with results based on all AAA races from 1902 to 1919, and first published his list in the 1952 Indianapolis 500 program. Using his own devised system of awarding championship points, this had the effect of retroactively creating seven new champions and changing the 1909 champion from Bert Dingley to George Robertson and the 1920 champion from Gaston Chevrolet to Tommy Milton. IndyCar currently recognizes Russ Catlin's list from 1909 to 1919, but with Gaston Chevrolet as champion for 1920.