Since 1980, 40 out of 45 NBA champions have had a Top pick in the draft, except

This seems like a stat that isn't doing much work. Most #1 overall picks will stick around in the league for >10 years even if they were a bust.

Since 1980, how many top picks have been NBA champions?

1980: Joe Carroll--0 championships
1981: Mark Aguirre--2 championships
1982: James Worthy--3
1983: Ralph Sampson--0
1984: Hakeem Olajuwon--2
1985: Patrick Ewing--0
1986: Brad Daugherty--0
1987: David Robinson--2
1988: Danny Manning--0
1989: Pervis Ellison--0
1990: Derrick Coleman--0
1991: Larry Johnson--0
1992: Shaquille O'Neal--4
1993: Chris Webber--0
1994: Glenn Robinson--1
1995: Joe Smith--0
1996: Allen Iverson--0
1997: Tim Duncan--5
1998: Michael Olowokandi--0
1999: Elton Brand--0
2000: Kenyon Martin--0
2001: Kwame Brown--0
2002: Yao Ming--0
2003: LeBron James--2
2004: Dwight Howard--0
2005: Andrew Bogut--0
2006: Andrea Bargnani--0
2007: Greg Oden--0
2008: Derrick Rose--0
2009: Blake Griffin--0
2010: John Wall--0
2011: Kyrie Irving--0
2012: Anthony Davis--0
2013: Anthony Bennett--0

So out of the past 34 #1 overall picks, 8 have won one or more championships. 8/34=24%... Basically what you are saying is if you have LeBron, Duncan, Shaq, Robinson, Olajuwon, Worthy, or Aguirre you have a good chance of winning a championship (I didn't include Glenn Robinson as he got a gift of a title).

Without your exceptions #1 draft picks are responsible for 21/34 of the past championships. Not really that impressive given that there are 12 (correct me if I'm wrong) teams with active #1 picks.

 

I still refuse to believe that Kenyon Martin was a #1 overall pick

 

Just think "Michael Olowokandi" and you'll believe.