Former Hawkeyes Duke Slater, Alex Karras named to Pro Football Hall of Fame
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Hall of Fame to honor Calvin Johnson and Alex Karras during Lions vs. Ravens
Detroit Lions Hall of Fame Players: A Complete History - Sports Illustrated
Meet Pro Football Hall of Fame's Class of 2020
From 'Mad Duck' to 'Mongo': Alex Karras' wild days of food, feuds and football - The Athletic
Long excluded, it's time for Iowa's Duke Slater and Alex Karras to be enshrined in the Pro Football Hall of Fame - The Athletic
Pro Football Hall of Fame 2020: Detroit Lions' Karras bigger than life