Titans.
Cleveland Cavaliers
There are different ways you could look at best team. One is by the teams record, or the team who won the world series. The team with the best record in 2008 was the Los Angeles Angels, but they got eliminated in the first round by the Boston Red Sox. The team that won the World Series that year was the Philadelphia Phillies. So it is more of your decision.
The team that has the best record or has the best season record.
The Tennessee Titans went 13 & 3.
In each league, the team with the best record normally plays the Wild Card team. The exception is that if the team with the best record and the Wild Card team are from the same division, then the team with the best record plays the division winner with the worst record.
It was the CLEVELAND CAVALIERS who had a record of 66-16...to be followed by the Los Angeles Lakers with a record of 65-17
The best team in the NBA history is Phoenix Suns.
Kansas
By the winners of each division and one wildcard team from each league. Wildcard team faces the best record team in each league unless the team with the best record and the wildcard team are from the same division. In that case, the wildcard team plays the divisional winner with the next best record.
1927 or 2001
The team with the best regular season record in 2004 was the Pittsburgh Steelers at 15-1.