 Ingwersen served as an assistant coach at Illinois under Robert Zuppke from 1921–1923, the team again winning the college national championship in 1923.Coach Howard Jones left the University of Iowa for Trinity College, now known as Duke University, in 1923 after eight years that saw two unbeaten seasons, and a 42–17–1 overall record, though aside from the two undefeated years Jones never finished higher than fourth in the conference.Paul Belting succeeded Jones as Iowa's athletic director, and needing new coach to fill Jones's shoes, he nearly lured Knute Rockne from Notre Dame.