BP: Best and worst teams of the '00s

Simple question put forth to us: the 2000s end in 14 days. Across the decade, who are the best and worst single-season teams? Throw out some ideas in your head before we begin: The 2001 Seattle Mariners? The 2001 Arizona Diamondbacks? The 2007 Boston Red Sox? Everyone has an idea, of course.

Now let's look at the numbers.