Parity Simplified-NFL
Since the 2000 season the Boston Red Sox have won the World Series twice while the New England Patriots have won the Super Bowl three times.People overlook that New England also finished last in their division once.
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In the NFL with 8 divisions and thirty-two teams there is a greater degree of parity evidenced by the following, even allowing for re-alignment:
AFC = 16 teams/4divisions x 4 teams,at least once.
11 out of 16 teams finished first,13 out of 16 teams finished last, 14 out of 16 teams made the play-offs, 8 out of 16 teams finished first and last during different seasons.Only Buffalo(sorry Doc) and Houston never made the play-offs.
NFC = 16 teams/4 divisions x 4 teams,at least once.
12 out of 16 teams finished first,13 out of 16 teams finished last,14 out of 16 teams made the play-offs,9 out of 16 teams finished first and last during different seasons.Only Arizona and Detroit never made the play-offs.
A less detailed look at MLB is very revealing - simply 9 out of the 30 teams have not made the play-offs since 2000 - Toronto,Baltimore,Tampa Bay,Kansas City,Texas,Montreal/Washington,Milwaukee,Cincinnati,Pittsburgh.