5 Titles, being the best player on every team
2 League MVPs
3 Finals MVPs
Currently 14th Overall in Scoring in league history
Currently 8th in all-time rebounds
Currently 6th in all-time blocks
#2 all-time in defensive win shares behind only Russell
15 Time All-NBA (he has only played 15 years)
15 Time All-NBA Defense
I'm not sure what statistic or what you have seen that makes you believe that Duncan doesn't belong on this list.