Johnny Grier, N.F.L.'s First Black Referee, Dies at 74 - The New York Times
List of people from Illinois - Wikipedia
Everett Daily Herald, September 13, 2015 by Sound Publishing - Issuu
Johnny Grier, NFL's first Black referee, dies at 74 – Football Zebras
The New York Times in Print for Saturday, March 12, 2022 - The New York Times
RIP Legend: Johnny Grier, the NFL's first Black referee dies at 74
Notable Deaths of 2022 - The New York Times