MaddHatter
Footballguy
Here is a little article I did up quick with some research into parity and winning championships in the NFL and MLB.
Link
Link
Since Super Bowl XXXV, there have been 13 different NFL franchises to make a Super Bowl appearance.
Since the 2000 World Series, there have been 14 different MLB clubs to make a World Series.
Although, only four NFL franchises have won the Super Bowl over the last six Super Bowls, five MLB clubs have won the World Series. But, during the last six Super Bowls, there have been just nine of 32 NFL teams to make the trip. Meanwhile, in baseball, ten of 30 MLB clubs have made the trip to the World Series.
The bottom line is, if you think there is no parity in baseball, there is even less in football.