Since the first Superbowl (or the inception of the NFL) Tom Brady has the highest winning percentage by a sizable margin 77.6%. Roger Staubach is No. 2 with 73.9%.
For a complete list refer to this Wikipedia site;
http://en.wikipedia.org/wiki/Most_wins_by_a_starting_quarterback_%28NFL%29
And sort by the Pct. column. The numbers are in decimal equivalent, so move the decimal to the right two places to get your percentage.
The information below is incorrect, because Otto Graham did not play in the NFL like the question asked. Graham played before the merger and it was not called the NFL at the time making the info below incorrect.
Also if read this Wikipedia page http://en.wikipedia.org/wiki/Daryle_Lamonica it is incorrect, because some will say that Daryle Lamonica and Otto Graham have higher winning percentages that Tom Brady and they do, but as stated before Graham did not play in what we call the NFL. Lamonica only played only part of his career in the NFL and his winning percentage in the NFL was lower than Tom Brady's. Lamonica's winning percentage before the NFL was about 90%.
(1) Otto Graham
(2) Tom Brady record of 83 wins / 24 losses for a 77.6%
(3) Roger Staubach record of 85 wins / 29 losses for a 74.6%
(4) Joe Montana record of 117 wins / 47 losses for a 71.3%
Note: this not an effective way to rank quarterbacks, so very good Qb's are at the bottom (Bulger) and some of the lower Qb's are at the top (Jamarcus Russell). Nonetheless...
{| |- | Team Quarterback Won Lost % Patriots Tom Brady 86 24 78.18 Cowboys Tony Romo 27 12 69.23 Steelers Ben Roethlisberger 51 23 68.92 Falcons Matt Ryan 11 5 68.75 Raiders Jamarcus Russell 11 5 68.75 Chargers Phillip Rivers 33 15 68.75 Ravens Joe Flacco 11 5 68.75 Colts Peyton Manning 117 59 66.48 Eagles Donovan McNabb 82 45 64.57 Jets Brett Favre 169 100 62.83 Panthers Jake Delhomme 50 31 61.73 Bears Rex Grossman 20 13 60.61 Giants Eli Manning 42 29 59.15 Cardinals Kurt Warner 57 44 56.44 Dolphins Chad Pennington 43 34 55.84 Bills Trent Edwards 12 10 54.55 Seahawks Matt Hasselbeck 61 51 54.46 49ers Shaun Hill 9 8 52.94 Vikings Tavaris Jackson 10 9 52.63 Jaguars David Garrard 24 22 52.17 Saints Drew Brees 55 51 51.89 Buccaneers Jeff Garcia 58 58 50.00 Bengals Carson Palmer 32 33 49.23 Titans Kerry Collins 80 85 48.48 Browns Derek Anderson 13 15 46.43 Rams Marc Bulger 40 47 45.98 Broncos Jay Cutler 17 20 45.95 Redskins Jason Cambell 16 20 44.44 Lions Dante Culpepper 41 54 43.16 Texans Matt Schaub 10 14 41.67 Packers Aaron Rodgers 6 10 37.50 Chiefs Tyler Thigpen 1 10 9.09
Chiefs Matt Cassel 10 5 66.67 Titans Vince Young 18 11 62.07 49ers Alex Smith 11 19 36.67
|}
Boise State's (Division I-FBS) Kellen Moore finished his career with a 50-3 (.924) record as a starter for the best win percentage.
Grand Valley State's (Division II) Cullen Finnerty finished his career with a 51-4 (.927) record as a starter for the most wins in College Football.
From 1933 to 2010, the Steelers are tied for 14th overall in the NFL with a .520 winning percentage.
298-136-3, is .685
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