Duesenberg racers continued to improve their performance and dominated the annual Indianapolis 500-mile races in the 1920s. In 1920 Tommy Milton and Jimmy Murphy won third and fourth places in Duesenberg racers in that year's Indianapolis 500. The field for the race in 1921 included eight Duesenberg-built racecars. The Duesenberg team car, driven by Roscoe Sarles, finished in second place. Duesenberg-built race cars took eight of the first ten places in Indianapolis 500-mile race in 1922, including the winning car, driven by Murphy, and the second-place finisher, driven by rookie Harry Hartz. The Indianapolis 500 in 1923 was a low point for the Duesenberg team. Wade Morton, the Duesenberg team driver, started twenty-fourth in the field, but finished in tenth place. Duesenberg-built racers won three out of the four Indianapolis 500-mile races between 1924 and 1927. Driver Lora L. Corum and relief driver Joe Boyer won the race in 1924; driver Pete DePaolo and relief driver Norman Batten won the race in 1925; and George Sanders won the race in 1927 in a Duesenberg-built car owned by Bill White. Driving a Duesenberg racer in 1925, DePaolo became the first Indianapolis 500-mile winner to average more than . In the 1926 race DePaulo finished in fifth place in a rain-shortened race, while the other Duesenberg team car, driven by rookie driver Ben Jones, experienced mechanical problems and crashed before the end of the race. The Duesenberg team continued to place in the top-ten in the 1928 and 1929 Indianapolis 500-mile races. In the 1928 race Fred Frame drove a Duesenberg racer to an eighth-place finish, while Jimmy Gleason drove a Duesenberg team car to a fifteenth-place finish. In the 1929 race the team's results improved with Gleason taking third and Freddy Winnai finishing in fifth place.