298-136-3, is .685
From 1933 to 2010, the Steelers are tied for 14th overall in the NFL with a .520 winning percentage.
The Philadelphia Eagles have a .483 all-time winning percentage.
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 Cleveland Brown's all time historical winning percentage was .535 which has topped the franchise's winning record and is high against other NFL teams.
Through the 2012 season, the San Francisco 49ers have a .555 all-time winning percentage.
University of Idaho .362 winning percentage (Kansas State has most all-time losses.)
The New Zealand rugby team, the All Blacks, have an all-time 74.49% winning percentage.
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.
Through Week 9 of the 2008 season, that would be the Broncos. The Broncos all time record is 382-340-10 for a winning percentage of .529 and the Eagles all time record is 484-527-25 for a winning percentage of .479.
According to Basketball Reference, the Lakers all time regular season record through the 2007-08 season is 2905-1824 for a winning percentage of .614.
Michigan
0.642