Date: 9/21/1970
Game: New York Jets @ Cleveland Browns

Ahh, where it all began. In the first official Monday Night Football game, the New York Jets (led by Joe Namath) took on the Browns at Cleveland Stadium. The Browns would win 31-21. The Jets may have lost, but it was really a victory for everyone because Mondays in fall and winter would be a bit more bearable for decades to come.