If the best team always won, would we be as interested?
25 seasons, the team with the best regular-season record only won the World Series eight times
How often does team with best regular season record win Super Bowl?
During the 1970s and 80s, the team with the best regular season record won the Super Bowl almost 75% of the time
And there has been a real drought most recently; from 2004-2009, the team with the best regular season record did not win the Super Bowl.
Teams that won the Super Bowl with the most wins during regular-season:
1960s: 1 of 4 (25%)
1970s: 8 of 10 (80%)
1980s: 6 of 10 (60%)
1990s: 4 of 10 (40%)
2000s: 2 of 8 (25%)
In 2009, for the fifth consecutive season, the team with the best regular-season record (Tennessee Titans, 13-3) did not win the Lombardi Trophy. The previous season, the New England Patriots and Tom Brady (right) were 18-0 in 2007 heading into the Super Bowl and lost. The last team with the best record to win it was the Patriots in 2003.
Found this on Quora. Is it right?