Analysis of information sources in references of the Wikipedia article "Madden Football 64" in English language version.
Football fanatics, however, will be very disappointed to know that Madden 64 doesn't feature the full NFL license, so real team names, team colors and team stadiums are not present. This means that you could be stuck playing the Chicago Bulldozers instead of the mighty Bears -- and they might be purple. Acclaim grabbed all the NFL licensing rights for its NFL QB Club '98 early and EA was left playing catch up. However, EA did manage to acquire the NFLPA (NFL Players Association) so real player names are present in the game.