vince young i think
Tom Brady and Bill Belichick
In any division it is Cullen Finnerty of Grand Valley State.
Derek Jeter
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.
There have been a lot of great quarterbacks-- Joe Montana, John Elway, Tom Brady, Peyton Manning. However, the legendary Otto Graham, who played for the Cleveland Browns in the 1950s and 60s holds the record for the highest winning percentage by a starting quarterback. He won 81. 4% of his games.
Bart Starr
Ben Roethlisberger (Pittsburgh Steelers) has the best winning percentage by far.
The 1986 New York Mets had a record of 108-54 for the highest winning percentage in franchise history with .667.
1982-83 Philadelphia 76ers have the best winning percentage in NBA Playoffs history at .923 (12-1).
Highest Winning Percentage, Regular Season Miami Dolphins .580 Highest Winning Percentage, Overall Dallas Cowboys .577