(As of end of 2008-2009 season)
By Wins:
1. Lenny Wilkens 1,332
2. Don Nelson 1,309
3. Pat Riley 1,210
4. Jerry Sloan 1,137
5. Larry Brown 1,045
6. Phil Jackson 1,041
7. Bill Fitch 944
8. Red Auerbach 938
9. Dick Motta 935
10. George Karl 933
By Percentage (min 500 games):
1. Phil Jackson .705
2. Billy Cunningham .698
3. Gregg Popovich .675
4. K.C. Jones .674
5. Red Auerbach .662
6. Pat Riley .636
7. Tom Heinsohn .619
8. Rick Adelman .616
9. Jerry Sloan .602
10. Flip Saunders .597
Source: http://www.nba.com/history/records/victories_coaches.html
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The five coaches that have lost the most games in the history of the NBA include, Sidney Lowe, Paul Silas, Tim Floyd, Quinn Buckner, and Bill Hanzlik. Many of these coaches finished one or more seasons losing more than 70 games.
Phil Jackson. His teams have been to the NBA finals 12 times and he has won ten NBA championships. He also has the most victories in the NBA finals round with 43. His NBA Finals record of 43-23 gives him a win percentage in the NBA finals of .652.
Don Nelson currently holds the record for the most wins as a NBA coach. His winning total is now at 1, 333 wins.