 Complete the following phrase:  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 years 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 