John Madden: A coach synonymous with football, thanks to a video game - Polygon
Madden NFL cover was just part of John Madden's influence on EA's video game series - The Washington Post
Gamer God: How Madden became the biggest name in football
Remembering John Madden, the video game character - Los Angeles Times
All Madden NFL cover athletes since 2000
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OTL: The Franchise - ESPN