Tim Duncan has spent seventeen years in San Antonio. During this time the Spurs have won 70.6% of their regular season games.
The Pop-Duncan combo has averaged 58 wins per year over almost two decades. To put this in perspective only two teams won this many games in the 2014 NBA season (Thunder and Spurs).
Since the 1998 season the only other franchises who won 60% of their games are the Lakers and Mavericks. Even with the assistance of Shaquille O’Neal, Kobe Bryant, Phil Jackson and Jerry West L.A. won an average of 52 games/year.