Teams with at least 4 World Series appearances, the Pittsburgh Pirates have the best winning percentage. 5 World Series titles in 7 Appearances, 5 -2 for a .714 winning percentage.
Teams with at least 10 World Series appearances, the New York Yankees have the best winning percentage. 27 World Series titles in 40 Appearances, 27 -13 for a .675 winning percentage.
Of teams that have played at least 10 World Series, that would be the New York Yankees with a World Series record of 26-13 for a winning percentage of .667. The Athletics are second at .643 (9-5) and the Red Sox are third at .626 (7-4). Four teams are undefeated in World Series play, the Marlins (2-0), Blue Jays (2-0), Diamondbacks (1-0), and Angels (1-0). The Pittsburgh Pirates have played in 7 World Series and have a record of 5-2 for a winning percentage of .714.
The Tigers best winning percentage for a regular season came in 1934 when they went 101-53 for a .656 winning percentage. They won the AL pennant but lost to the St. Louis Cardinals in the World Series. The most wins the Tigers had in a regular season is 104 in 1984. They won the AL pennant and defeated the San Diego Padres in the World Series.
Ben Roethlisberger (Pittsburgh Steelers) has the best winning percentage by far.
Highest Winning Percentage, Regular Season Miami Dolphins .580 Highest Winning Percentage, Overall Dallas Cowboys .577
The 1927 Yankees, arguably the greatest baseball team of all-time, had a winning percentage of .714 (coincidentally the number of career homeruns by Babe Ruth) by going 110-44. In 1998, they had a winning percentage of .704 with a won-loss record of 114-48. These are the only years their winning percentage was above .700. They swept the World Series in both of these years.
Tom Brady and Ben Roethlisberger are the two quarterbacks that have the best winning percentage in their first 4 years in the NFL. Ben Roethlisberger has the fourth highest career winning percentage as a quarterback.
No, Ohio State's winning percentage is 71.6%. It is the fifth highest of All-time. The University of Michigan holds the highest winning percentage of 74%
The 1906 Chicago Cubs have the best winning percentage for a season with .763. The Cubs 1906 record was 116-36.
The New England Patriots have the best win percent since 2011, with a 3 season average winning percentage of .771.
The Baeball World Series is best of 7. So the winning team has to win 4 games to win the MLB World Series. A team has to win 7 playoff games in order to advance to the World Series. The Divisional Series (ALDS or NLDS) is the best of 5 and the Championship Series (ALCS or NLCS) is the best of seven.