Slater, who died in 1966 at age 67, was the first African American lineman in NFL history and a six-time All-Pro selection. At Iowa, he led his team to a perfect 7-0 campaign in 1921 and was a first-team All-American. The UI law graduate was a district attorney after his playing career ended and became the first black member of the Chicago Superior Court.
Karras, who died in 2012 at age 77, played his entire 13-year NFL career with the Detroit Lions and was a nine-time All-Pro. A two-time All-American at Iowa, Karras won the 1957 Outland Trophy as the nation's best lineman and helped guide the Hawkeyes to a Rose Bowl title after the 1956 season. Karras later made a name for himself as an actor and producer, appearing in the movie Blazing Saddles and starring on the TV show Webster.