2000-01 Los Angeles Lakers
The Spurs were 10-1 in the 2012 playoffs entering Game 4 of the Western Conference semifinals. San Antonio, of course, still has a long way to go to join the list of the best postseason runs in NBA history based on winning percentage. The 2000-01 Lakers, led by Shaquille O'Neal and Kobe Bryant, top that list after dropping only one game en route to their second of three straight titles. The Lakers' only playoff loss that season came in overtime against the 76ers in Game 1 of the NBA Finals.