A History of Sega's NFL Games - Sega Does
Which Sega Sports NFL game did you enjoy the most? : r/SEGAGENESIS
A History of Sega's NFL Games
Madden NFL 22: What are the best football video games ever?
NFL 2K Series, 2K Sports Wiki
The History of Football Games - GameSpot
John Madden Football (1990 video game) - Wikipedia
NFL Football '94 Starring Joe Montana (Sega Genesis) - Houston Oilers at Dallas Cowboys
NFL 98 Sega Genesis Gameplay HD
Madden Football History and EA's Other Notable Genesis Football Games - RetroGaming with Racketboy