Yes the Patriots were undefeated but then again they only play 16 games...and they didn't win it all. Though that doesn't mean anything in this poll did maybe burning themselves out to be undefeated hurt them eventually?
The Celtic got off to the best record in the history of basketball once having a 29-3 record. They had the single greatest turnaround in NBA history and had statistically one of the best defenses ever.
The Red Sox won 98 games in a division that had the 101 win Yankees and were in a league with 4 team with over 92 wins. They had the third best offense in team history and had the best run differential in team history.
This year's Bruins team haven't finished the season but barring major health problems this year's Bruins team looks to be the most dominant hockey team in the NHL in possibly a decade or two. The have the most points per game, they have, by over 20 goals, the best goal differential in the league with the best GAA, best GPG, and haven't let up a goal on a power play in the last 27 man down situations. They happen to have won 21 of their last 24 games. [dang] impressive for any sport.