From Tom Ziller's Fanhouse article in response to Malcolm Gladwell's position that the draft is harmful
Let's take a look at this season's All NBA teams.
FIRST TEAM
LeBron James, Dirk Nowitzki, Dwight Howard, Kobe Bryant, Dwyane Wade
SECOND TEAM
Paul Pierce, Tim Duncan, Yao Ming, Brandon Roy, Chris Paul
THIRD TEAM
Carmelo Anthony, Pau Gasol, Shaquille O'Neal, Chauncey Billups, Tony Parker
These are, according to the voters, the 15 best players in the NBA in 2008-09, with some flubbing necessary for positional purposes. (Read: Shaq doesn't belong there.) Notice anything odd about the list?
The entire first team is made up of players who have only ever played for one team, the team which drafted them or acquired them on their draft day. The entire second team fits the same bill. Two third-team players have only played for one team. Of the other three, only Shaq and Billups have ever changed teams in free agency (Pau has been traded once). The one time Shaq changed teams in free agency, he signed with a large-market team (Lakers) with a winning (53-29) record. Billups has signed with teams as a free agent twice. In both cases, the team was coming off a 50-win season.
link here
It's a quick read that reaffirms that under NBA rules elite players rarely if ever change teams. It also serves as a reminder how badly Billy Knight screwed over Hawks fans.