Expert: Borko Bariæ - 5/29/2004

Question
Are there any players who have won consecutive championships while playing with different teams?

Answer
Hi!
The moment I read your question, I thought of Steve Kerr. He was a member of 1997-98 Chicago Bulls, won a championship and then was signed-and-traded to San Antonio Spurs and again won a title in 1999.
I did find some data about him being the second player to accomplish that feat, but was unable to find who the first one was. Most likely that happened in the founding years of the league.