Copy of 'John Madden Football' video game sells for world-record price: Here's how much it went for
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Madden NFL 2001 - Wikipedia
How John Madden Became the Face of a Video Game Empire - The New York Times
John Madden profiled in first episode of new 'NFL Icons' season
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John Madden, Former NFL Coach and TV Broadcaster, Dead at 85
John Madden dead at 85, NFL icon made football a moment
John Madden profiled in first episode of new 'NFL Icons' season