No, the season is long. The best teams lose about a third of the time. Even the worst team can beat the best team sometime during the season.
The MLB team that has gone undefeated in the playoffs were the 1976 Cincinatti Reds swept the Phillies 3-0 in the NLCS and then swept the Yankees 4-0.
no it has never happened
Florida Marlins
never
No
None. The White Sox and Yankees have each compiled 11-1 records in the playoffs, however.
Miami heat sweept the first two
the Miami dolphins
As near as I can tell from eye-balling/cross referencing a couple of websites, there has never been a situation where the team with the MVP on its roster did not make the playoffs.
With the Houston Texans making the playoffs this year every team will have been to the playoffs.
no team has ever gone undefeated
No not as yet