...it was written 2 years ago, but at the time the New York Yankees had the HIGHEST percentage of players that came up through their organization in the entire American League. Most of the players he mentions are still on the team (Jeter, Cano, Posada, Gardner, Rivera, etc.)

http://zellspinstripeblog.com/2009/08/02/the-yanks-have-homegrown-players/

In any event, it's a misconception that the Yankees have gone out and bought their entire team. Certainly "Of the 9 players they put on the field, only 1 or 2 actually went through their minor league systems" is not true.