2007 New England Patriots with a 16-0 regular season
The team with the best regular season record in 2004 was the Pittsburgh Steelers at 15-1.
The Vikings had the best regular season record in 1998 at 15-1.
The Packers' best NFL regular season record was in the 2011 season, when they went 15-1.
According to the Pro Football Hall of Fame, as of the start of the 2007 season the team with the best all time regular season winning percentage was the Miami Dolphins whose all time regular season record was 368-252-4 for a winning percentage of .593. Second was the Chicago Bears with an all time regular season record of 670-482-42 for a winning percentage of .579.
The Boston Celtics regular season record was 68-14 in the 1972-73 season.
The Miami Dolphins won Super Bowl VII after posting a regular season record of 14-0.
2001 seattle marlins
Your Answer: Houston Astros
The Cowboys had regular-season records of 13-3 in 1992 and 2007.
That was the St. Louis Cardinals at 100-62. In the American League, the Chicago White Sox had the best regular season record at 99-63.